维普中文期刊产品整合服务
46044篇 您的检索式:作者名="K O"
    题名 作者 年代 出处 被引量
1Viral and host causes of fatty liver in chronic hepatitis B显示文摘AIM: To investigate the viral and host causes of fatty liver in chronic hepatitis B patients and the role of fat deposits in liver damage.METHODS: A total of 164 patients (113 males and 51 females, average age 35±11.3 years, and range 10-62 years) with previously untreated chronic hepatitis B were included in the study. The patients were divided into two groups depending on the result of liver biopsy: group without steatosis (100 patients with <5% hepatosteatosis) and group with steatosis (64 patients with >5% hepatosteatosis). The groups were compared in terms of gender, body mass index (BMI), liver enzymes (ALT, AST, ALP, GGT), cholesterol, triglyceride, HBeAg, viral load, and histological findings. In the group with steatosis, the patients were subdivided depending on the degree of steatosis into mild group (45 patients with 5-24% steatosis), and severe group (19 patients with >25% steatosis). RESULTS: In the group of chronic hepatitis B with steatosis, the mean age, BMI, cholesterol, and triglyceride levels were significantly higher than those in the group without steatosis (P<0.05). Steatosis was found in 53 (46.9%) of male patients and 11 (22%) of female patients (P<0.05). No significant difference was found in the positivity of ALT, AST, ALP, GGT, HBeAg, viral load, histological activity index (HAI) and stage between the two groups (P>0.05). In the group with severe steatosis, the BMI was significantly higher than that in the group with mild steatosis (P<0.05). No significant difference was found in the other parameters between the groups (P>0.05). CONCLUSION: Steatosis in chronic hepatitis B appears to be a result of metabolic factors of the host rather than the effect of viruses. Steatosis is unrelated to the HAI and degree of fibrosis, which are considered as the histological indicators of liver damage.Emin Altiparmak Seyfettin K(o|¨)klü Mesut Yalinkilic Osman Yüksel Bahattin Cicek Ertugrul Kayacetin Tülin Sahin 2005World Journal of Gastroenterology2005,11,20:52
2AGNP精神科治疗药物监测共识指南:2011显示文摘治疗药物监测(Therapeutic drug monitoring,TDM),如通过定量测定血清或血浆药物浓度指导用药剂量优化,已经成为对患者进行精神药物治疗的很有价值的工具。在患者用药依从性难以判断、药物耐受性不佳、治疗剂量下无效以及可能存在药代动力学药物-药物相互作用等情况下,测定药物浓度是很有用的。在精神科,有可能明显获益于TDM的主要患者群体包括儿童、孕妇、老年患者、智力障碍患者、涉及司法的患者、已知或怀疑携带药代动力学相关基因变异的患者,以及合并躯体疾病影响药代动力学的患者。然而,只有将TDM充分整合到临床治疗过程中去,才能发挥其优化药物治疗的潜在优势。为了促进TDM的合理应用,神经精神药理学与药物精神病学协会(Arbeitsgemeinschaft für Neuropsychopharmakologie und Pharmakopsychiatrie,AGNP)的TDM专家组在2004年发表了精神药物治疗药物监测指南。之后,随着知识不断更新,又有许多可能需要进行TDM的新药上市。因此,本次更新将神经精神药物的种类扩展到了128种,并将其TDM必要性划分为从'强烈推荐'到'可能有用'的四个等级。经过大量细致且全面的文献检索与分门别类的汇总整理,将基于循证医学理念的'治疗参考浓度范围'和'剂量相关参考浓度范围'呈现给大家。本共识指南引入了'实验室警戒浓度'的新概念,即实验室需要马上告知治疗医生的药物浓度上限。本共识指南还给出了诸如药物作为细胞色素P450酶的底物和抑制剂的性质,代谢物与母药浓度比值的常见范围,以及与结果解释相关的内容,还提供了何时将TDM与遗传药理学检测相结合的建议。遵循本指南,有助于改善许多患者精神药物治疗的效果,特别是那些存在药代动力学异常的患者。TDM是一门交叉学科,有时针对看起来不一致的数据,需要多学科坦诚地讨论,只有这样,患者才能从这种合作中获益。Hiemke C Baumann P Bergemann N Conca A Dietmaier O Egberts K Fric M Gerlach M Greiner C Gründer G Haen E Havemann-Reinecke U Jaquenoud Sirot E Kirchherr H Laux G Lutz UC Messer T Müller MJ Pfuhlmann B Rambeck B Riederer P Schoppek B Stingl J Uhr M Ulrich S Waschgler R Zernig G 李文标(译) 果伟(译) 阮灿军(译) 贺静(译) 汤宜朗(审校) 王传跃(审校) 2016实用药物与临床2016,19,10:37
3尿钠排泄、血压、心血管病与死亡率的关系:社区前瞻性流行病学队列研究显示文摘WHO建议人群钠摄人<2 g/d作为预防心血管病的措施之一,但这一目标在任何国家都没有实现。该建议主要基于短期血压试验的个体水平数据,没有来自随机试验或观察性研究的关于低钠摄入与降低心血管事件的数据。前瞻性城市农村流行病学研究目前正在21个国家进行。该文对其中18个国家的数据进行分析,其中包含了临床结果数据。Mente A O'Donnell M Rangarajan S McQueen M Dagenais G Wielgosz A Lear S Ah STL Wei L Diaz R Avezum A Lopez-Jaramillo P Lanas F Mony P Szuba A Iqbal R Yusuf R Mohammadifard N Khatib R Yusoff K Ismail N Gulec S Rosengren A Yusufali A Kruger L Tsolekile LP Chifamba J Dans A Alhabib KF Yeates K Teo K Yusuf S 刘莉 叶鹏 2018中华高血压杂志2018,26,12:29
4血管性认知障碍的诊断标准:国际血管性行为与认知障碍学会的申明显示文摘长期以来,脑血管病(CVD)就被认为是认知损害的一个重要原因,但是有关脑血管病后认知障碍的概念化却有着一段多变的历史。'动脉变硬'或脑的动脉粥样硬化是'老化'的原因,是存在已久的观点,在20世纪60年代受到了来自英格兰纽卡斯尔的神经病理学研究的质疑。这些研究表明,血管性痴呆(vascular dementia,Va D)与超过一定程度的多发性脑梗死有关。徐岩 郭起浩 Sachdev P Kalaria R O'Brien J Skoog I Alladi S Black SE Blacker D Blazer DG Chen C Chui H Ganguli M Jellinger K Jeste DV Pasquier F Paulsen J Prins N Rockwood K Roman G Scheltens P 2014神经病学与神经康复学杂志2014,11,3:19
5Transarterial chemoembolization and bland embolization for hepatocellular carcinoma显示文摘Transarterial chemoembolization(TACE)is the first line treatment for patients with intermediate stage hepatocellular carcinoma but is also increasingly being used for patients on the transplant waiting list to prevent further tumor growth.Despite its widespread use,TACE remains an unstandardized procedure,with variation in type and size of embolizing particles,type and dose of chemotherapy and interval between therapies.Existing evidence from randomized controlled trials suggest that bland transarterial embolization(TAE)has the same efficacy with TACE.In the current article,we review the use of TACE and TAE for hepatocellular carcinoma and we focus on the evidence for their use.Emmanuel A Tsochatzis Evangelia Fatourou James O'Beirne Tim Meyer Andrew K Burroughs 2014World Journal of Gastroenterology2014,20,12:18
6Immunoexpression of cyclooxygenase-2 in primary gastric carcinomas and lymph node metastases显示文摘AIM: To evaluate immunoexpression of cyclooxygenase-2 (COX-2) in primary gastric carcinomas and respective lymph node metastases. METHODS: Immunohistochemistry to analyze COX-2 expression was performed on tissue microarray slices obtained from 36 specimens of gastrectomy and satellite lymph nodes from patients with gastric carcinoma. RESULTS: Immunostaining was seen in most cases, and COX-2 expression was higher in lymph node me-tastases than in corresponding primary gastric tumors of intestinal, diffuse and mixed carcinomas, with a statistically signif icant difference in the diffuse histotype (P = 0.0108). CONCLUSION: COX-2 immunoexpression occurs frequently in primary gastric carcinomas, but higher expression of this enzyme is observed in lymph node metastases of the diffuse histotype.Paulo RC Almeida Francisco VA Ferreira Cássio C Santos Francisco D Rocha-Filho Raul RP Feitosa Esther AA Falco Belise K Cavada Roberto CP Lima-Júnior Ronaldo A Ribeiro 2012World Journal of Gastroenterology2012,18,8:14
7父母参与NICU患儿护理的优势与挑战显示文摘在围产期护理发展之前,新生儿都是在家庭出生并由其父母和助产士进行护理。自20世纪初期,医院开始为新生儿、早产儿提供医疗服务和专业护理,取代了父母的家庭护理。1979年护士出现短缺,爱沙尼亚塔林儿童医院新生儿病房开展了一个新的护理模式,该项目规定:新生儿全天24 h由父母看护,必要的时候医护人员给予帮助;尽可能的提倡母乳喂养;尽量减少医疗技术使用。李变 张欣 Warre R O'Brien K Lee SK 2015中国新生儿科杂志2015,30,6:12
8Mouse models in male fertility research显示文摘男不孕的基因原因的有限知识导致了很少处理并且指向了治疗学的选择。尽管识别引起变化的不孕的理想的途径是在人的人口进行研究,这条途径由于此处描述的限制慢慢地进行了。给男富饶的复杂性,全部过程不能在 vitro 被建模。因此,动物当模特儿,特别地老鼠模型,为基因鉴定和试验提供一种珍贵选择。自从在动物模型生产的分子的生物学和最近的进展的介绍,在与许多疾病联系的基因的鉴定和描述有实质的加速,包括不孕。老鼠模型的三种主要类型通常在生物医学的研究被使用,包括 knockout/knockin/gene-trapped,转基因、导致化学药品的点异种老鼠。使用这些老鼠模型,在为男富饶的 400 基因必需品上被揭示了。然而,几千基因涉及男富饶的复杂过程的规定,这被估计了,当许多如此的基因尚待被描绘。当前的评论绝非是这些鼠标模型,的一张全面的表相当,它包含鼠标模型怎么推进了我们出生后的细菌房间开发和男富饶规定的知识的例子。Duangporn Jamsai Moira K O'Bryan 2011Asian Journal of Andrology2011,13,1:10
9Napsin A在子宫内膜透明细胞腺癌中高表达:具有潜在的诊断价值显示文摘伴透明细胞高级别子宫内膜癌的组织学分型在不同病理观察者之间存在较大分歧,因此,在子宫内膜透明细胞腺癌(CCC)的鉴别诊断中,分子标志物或可发挥重要诊断价值。该文旨在评估NapsinA对诊断CCC的应用价值。作者选取经9所机构诊断的77例CCCs,由3名病理医师进行独立复片诊断,最终选出一致诊断为CCC的一组60例样本(意见一致组),用于评估NapsinA的表达。Fadare O Desouki M M Gwin K 陈远钦 余英豪 2014临床与实验病理学杂志2014,30,7:9
10高通气综合征?还是惊恐障碍?显示文摘韩江娜 R Schepers K Stegen O Van den Bergh KP Van de Woestijne 2001中华结核和呼吸杂志2001,24,9:9
11IL28B polymorphism and cytomegalovirus predict response to treatment in Egyptian HCV type 4 patients显示文摘AIM:To test whether the status of positive cytomegalovirus(CMV) DNA detection adds to the predictive value of IL28B and to further categorize C/T allele carriers.METHODS:This study included 166 chronic hepatitis C(CHC) patients who received combined interferon and ribavirin therapy for 48 wk,84 spontaneous hepatitis C virus(HCV) resolvers who were positive for IgG anti-HCV antibody and negative for HCV RNA,and 100 healthy subjects who were negative for both HCV antibodies and RNA as controls.Genomic DNA from peripheral blood was used for IL28B rs.12979860 single nucleotide polymorphism(SNP) and CMV DNA detection.A 139 bp fragment containing IL28B SNP was amplified in all subjects by polymerase chain reaction using a specifically designed primer.Then the IL28B rs.12979860 SNP was detected by restriction fragment length polymorphism(RFLP) genotyping.The presence of CMV DNA was tested by amplification of the gB1 gene using nested polymerase chain reaction.The role of CMV and IL28B rs.12979860 SNP genotypes in determining the response rate to combined interferon therapy and clinical status of patients were statistically analyzed.RESULTS:Current data showed that 67% of patients carrying the IL28B 12979860 C/C allele had a sustained viral response(SVR) while the genotypes C/T and TT were associated with lower SVR rates,50% and 48%,respectively.SVR rates for the C/C allele were lower than other HCV genotypes and/or other populations.Genotype CC was associated with the response to interferon(P = 0.025).Genotype C/C was reduced from 48% in controls to 14% in CHC patients suggesting its protective role against progression to chronicity.The majority of spontaneously cleared subjects(86%) were C/C,confirming its protective role.The C/T allele was present in 71% of CHC patients compared with 38% of controls,so the use of IL28B SNP genotyping only in these patients may be of little value as a predictor of response.CMV reactivation occurred in 40% of CHC patients.Co-infection with CMV seriously diminished the response to interferon(IFN) therapy,with SVR rates in C/C genotypes 87.5% in CMV-negative patients and 12.5% in CMV-positive patients(P < 0.0001).SVR rates among C/T carriers were reduced to < 50% in patients with positive CMV DNA while the non-response rate doubled.These data indicate that a supplemental assay for CMV viremia adds to the prognostic value of IL28B genotyping.CONCLUSION:The results suggest that both genetic(i.e.,spontaneous) and therapeutic(IFN-based therapy) arms are complementary in the battle against HCV.CMV DNA testing may be of value to better predict the response to IFN,particularly in IL28B C/T carriers.Mostafa K El Awady Noha G Bader El Din Ashraf Tabll Yaser El Hosary Ashraf O Abdel Aziz Hesham El Khayat Mohsen Salama Tawfeek H Abdelhafez 2013World Journal of Gastroenterology2013,19,2:8
12The role of cysteine-rich secretory proteins in male fertility显示文摘充满半胱氨酸的能分泌的蛋白质(CRISPs ) 是 CRISP,的亚群抗原 5 并且 Pr-1 (帽子) 蛋白质总科,并且仅仅在脊椎动物被发现。他们显示出强壮的表示偏爱到哺乳动物的男繁殖的道和有毒的爬行动物的毒液。在男繁殖的道以内, CRISPs 在跨越 haploid 细菌房间开发, epididymal 成熟, capacitation,活动性和授精的实际进程的男细菌房间生物学的许多方面被含有。在结构的水平, CRISPs 由二个领域,一个帽子领域,它在房间鈥揷e ll 粘附被含有,和一个松脆的领域组成,它被显示了越过多重种类调整离子隧道的几个班。此处,我们将在男富饶在 CRISPs 的角色上考察当前的文学,并且由到相关非哺乳动物的蛋白质的推理,推断潜在的生物化学的功能。Adam J Koppers Thulasimala Reddy Moira K O'Bryan 2011Asian Journal of Andrology2011,13,1:8
13大气二氧化氮与每日总死亡率、心血管和呼吸系统疾病死亡率的短期关联:398个城市的多中心分析显示文摘目的:采用统一的分析方案,评估全球多个国家/地区的二氧化氮(NO_(2))与总死亡率、心血管和呼吸系统疾病死亡率之间的短期关联。研究设计:采用两阶段的时间序列分析方法、过度离散的广义线性模型和多水平meta分析。研究地点:22个低到高收入国家/地区的398个城市。主要结局指标:1973—2018年逐日总死亡人数(6280万人)、心血管疾病死亡人数(1970万人)和呼吸系统疾病死亡人数(550万人)。结果:平均而言,NO_(2)浓度在滞后1天(前1天)每增加10μg/m^(3),会导致总死亡率、心血管和呼吸系统疾病死亡率分别增加0.46%(95%可信区间0.36%~0.57%)、0.37%(0.22%~0.51%)、0.47%(0.21%~0.72%)。在对共污染物(PM_(10)、PM_(2.5)、臭氧、二氧化硫和一氧化碳)进行调整后,这些关联仍然很稳定。所有3种死因的暴露-反应曲线几乎是线性的,没有明显的阈值。在398个城市中,可归因于高过假定零水平的NO_(2)浓度造成的死亡比例为1.23%(95%可信区间0.96%~1.51%)。结论:这项多中心研究提供了关于NO_(2)短期暴露与总死亡率、心血管和呼吸系统死亡风险之间的独立和线性关联的关键证据,说明通过加强NO_(2)的控制和监管限制标准,可获得人群水平的健康收益。孟夏 刘聪(校) 陈仁杰 郑湃(译) 阚海东(校) Francesco Sera Ana Vicedo-Cabrera Ai Milojevic Maria Guo Yuming Tong Shilu Micheline de Sousa Zanotti Stagliorio Coelh Paulo Hilario Nascimento Saldiva Eric Lavigne Patricia Matus Correa Nicolas Valdes Ortega Samuel Osorio Garcia Jan Kysely Ales Urban Hans Orru Marek Maasikmets Jouni J K Jaakkola Niilo Ryti Veronika Huber Alexandra Schneider Klea Katsouyanni Antonis Analitis Masahiro Hashizume Yasushi Honda Chris Fook Sheng Ng Baltazar Nunes João Paulo Teixeira Iulian Horia Holobaca Simona Fratianni Ho Kim Aurelio Tobias Carmeníniguez Bertil Forsberg ChristoferÅström Martina S Ragettli Yue-Liang Leon Guo Shih-Chun Pan Shanshan Li Michelle L Bell Antonella Zanobetti Joel Schwartz Tangchun Wu Antonio Gasparrini 2021英国医学杂志中文版2021,24,8:7
14Highly efficient derivation of ventricular cardiomyocytes from induced pluripotent stem cells with a distinct epigenetic signature显示文摘从 pluripotent 干细胞导出的 Cardiomyocytes 能在药测试,疾病建模和基于房间的治疗被使用。没有 procardiogenic 生长因素,然而,从 pluripotent 干细胞的 cardiomyogenesis 的效率通常是低的,产生 cardiomyocyte 人口是异构的。这里,我们证明导致的 pluripotent 干细胞( iPSCs )能从鼠科的室的 myocytes ( VM )被导出,并且与从各种各样的体的房间类型导出的 iPSCs 的另外的报告一致,自发地作为与遗传上匹配的胚胎的干细胞(转换字符)或 iPSCs 相比区分 cardiomyocytes 进跳动的显著地更高的倾向从尾巴尖端成纤维细胞导出的 导出VM 的 iPSCs ( ViPSCs )展览。惊人地,导出 ViPSC 的 cardiomyocytes 显示的多数室的显型。在 ViPSCs 的提高的室的 myogenesis 在区别的早阶段经由心血管的祖先的增加的数字被调停。以便从 ViPSCs 调查提高的室的 myogenesis 的机制,我们执行了全球基因表示和 DNA methylation 分析,它揭示了可以涉及在 pluripotent 干细胞指定 VM 命运的不同 epigenetic 签名。Huansheng Xu B Alexander Yi Hao Wu Christoph Bock Hongcang Gu Kathy O Lui Joo-Hye C Park Ying Shao Alyssa K Riley Ibrahim J Domian Erding Hu Robert Willette John Lepore Alexander Meissner Zhong Wang Kenneth R Chien 2012Cell Research2012,22,1:7
15铝合金上电沉积Ni-P-CNTs复合镀层及其摩擦性能研究显示文摘采用复合电沉积法在铝合金表面上制备了镍-磷-碳纳米管(Ni-P-CNTs)复合镀层,并用X射线衍射(XRD)和扫描电镜(SEM)对其进行了表征,分析了电流密度和镀液中碳纳米管的质量浓度对复合镀层形貌及其摩擦磨损性能的影响.当电流密度为3.0 A/dm2时可以得到表面光亮、平整的复合镀层,复合镀层中碳纳米管体积分数随着镀液中碳纳米管质量浓度的增加而增加.Ni-P-CNTs复合镀层比Ni-P镀层具有更高的硬度、耐磨性能和更低的摩擦系数.随着复合镀层中碳纳米管体积分数的增加,复合镀层的磨损量和摩擦系数逐渐降低.复合镀层摩擦性能的改善是由于碳纳米管具有优异的力学性能和良好的自润滑性能.陈卫祥 涂江平 王浪云 王玉琮 刘新宽 CHARLS O L K 2008浙江大学学报(工学版)2008,42,11:7
16The role of peroxisome proliferator-activated receptor gamma in prostate cancer显示文摘Catherine Elix Sumanta K Pal Jeremy O Jones 2018Asian Journal of Andrology2018,20,3:7
17Esophageal tuberculosis presenting with hematemesis显示文摘Esophageal tuberculosis is rare, constituting about 0.3% of gastrointestinal tuberculosis. It presents commonly with dysphagia, cough, chest pain in addition to fever and weight loss. Complications may include hemorrhage from the lesion, development of arterioesophageal fistula, esophagocutaneous fistula or tracheoesophageal fistula. There are very few reports of esophageal tuberculosis presenting with hematemesis due to ulceration. We report a patient with hematemesis that was due to the erosion of tuberculous subcarinal lymph nodes into the esophagus. A 15-year-old boy presented with hemetemesis as his only complaint. Esophagogastroduodenoscopy(EGD) revealed an eccentric ulcerative lesion involving 50% of circumference of the esophagus. Biopsy showed caseating epitheloid granulomas with lymphocytic infiltrates suggestive of tuberculosis. Computerised tomography of the thorax revealed thickening of the mid-esophagus with enlarged mediastinal lymph nodes in the subcarinal region compressing the esophagus along with moderate right sided pleural effusion. Patient was treated with anti-tuberculosis therapy(Rifampicin, Isoniazid, Pyrazinamide, Ethambutol) for 6 mo. Repeat EGD showed scarring and mucosal tags with complete resolution of the esophageal ulcer.Samit S Jain Piyush O Somani Rajeshkumar C Mahey Dharmesh K Shah Qais Q Contractor Pravin M Rathi 2013World Journal of Gastrointestinal Endoscopy2013,5,11:6
18Do probiotics have a therapeutic role in gastroenterology?显示文摘Several hundred species of bacteria inhabit the gut, and affect its cell biology, morphology and homeostasis. Many bacteria are however potential pathogens, especially if the integrity of the epithelial barrier is physically or functionally breached. Conversely, the interaction between host and commensal microbes can confer important health benefits. This has led to commercial and public interest in ’probiotics’, live microbes principally taken as food supplements. Might probiotics also be used in disease therapy? Experimental evidence that probiotics modulate gut physiology, particularly barrier integrity and immunological function, underpins exciting new gastroenterological research. We discuss below the scienti?c basis for probiotic effects and present a critical perspective for their use in relation to gastrointestinal disease.Jimmy K Limdi Catherine O’Neill John McLaughlin 2006World Journal of Gastroenterology2006,12,34:6
19磨矿介质材质与捕收剂添加方式对某铜镍硫化矿浮选的影响显示文摘通过磨矿和浮选试验研究了低碳钢和不锈钢两种磨矿介质与捕收剂添加方式对某铜镍硫化矿(Nkomati矿)浮选的影响。试验研究使用实验室用圆筒形棒磨机和机械搅拌式挂槽浮选机完成,通过浮选水回收率、精矿产率和有用矿物回收率分析了磨矿介质和捕收剂添加方式对铜镍硫化物浮选行为的影响。研究中对矿浆pH值、氧化还原电位(Eh)和溶解氧(Do)等溶液化学性质进行了测定,以考察磨矿介质及捕收剂添加方式对溶液化学性质的影响。磨矿介质对Nkomati矿的矿浆溶液化学性质和浮选行为具有显著影响,经低碳钢磨矿后,具有较高的铜、镍和磁黄铁矿回收率,EDTA可浸出铁的含量更高,Do值更低。不同磨矿介质磨矿条件下,捕收剂添加方式对铜镍矿浮选的影响规律不同,低碳钢磨矿时,捕收剂添加在浮选槽中的铜回收率较高;不锈钢磨矿时,捕收剂添加在磨机中的铜和镍的回收率较高。宋振国 K Corin J G Wiese C T O'Connor 2017矿产保护与利用2017,37,6:6
20埃索美拉唑能有效控制内镜阴性胃食管反流症状——6个月“按需治疗”对照试验显示文摘Talley NJ Lauritsen K Tunturi-Hihnala H Lind T Moum B Bang C Schulz T Omland TM Delle M Junghard O 钟捷 2003中华消化杂志2003,23,1:6
返回顶部 每页显示:
共2303页 首页 上一页 第1页 下一页 末页 /2303 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费