首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   88596篇
  免费   8812篇
  国内免费   555篇
耳鼻咽喉   259篇
儿科学   2260篇
妇产科学   2472篇
基础医学   5812篇
口腔科学   4370篇
临床医学   16172篇
内科学   7451篇
皮肤病学   633篇
神经病学   5217篇
特种医学   839篇
外科学   3305篇
综合类   8142篇
现状与发展   3篇
一般理论   90篇
预防医学   34498篇
眼科学   312篇
药学   3272篇
  81篇
中国医学   860篇
肿瘤学   1915篇
  2024年   206篇
  2023年   2582篇
  2022年   2433篇
  2021年   4933篇
  2020年   4997篇
  2019年   4779篇
  2018年   4161篇
  2017年   3970篇
  2016年   3816篇
  2015年   3747篇
  2014年   5865篇
  2013年   7828篇
  2012年   5101篇
  2011年   5619篇
  2010年   4132篇
  2009年   4317篇
  2008年   4178篇
  2007年   4220篇
  2006年   3628篇
  2005年   2790篇
  2004年   2406篇
  2003年   2064篇
  2002年   1554篇
  2001年   1476篇
  2000年   1282篇
  1999年   884篇
  1998年   760篇
  1997年   601篇
  1996年   500篇
  1995年   356篇
  1994年   332篇
  1993年   337篇
  1992年   286篇
  1991年   236篇
  1990年   191篇
  1989年   157篇
  1988年   181篇
  1987年   120篇
  1986年   108篇
  1985年   135篇
  1984年   103篇
  1983年   79篇
  1982年   83篇
  1981年   62篇
  1980年   68篇
  1979年   47篇
  1978年   53篇
  1977年   55篇
  1976年   46篇
  1975年   44篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
The value of adding simeprevir (SMV) vs placebo (PBO) to peginterferon and ribavirin (PR) for treatment of chronic hepatitis C virus infection was examined using patient‐reported outcomes (PROs); further, concordance of PROs with virology endpoints and adverse events (AEs) was explored. Patients (= 768 SMV/PR,= 393 PBO/PR) rated fatigue (FSS), depressive symptoms (CES‐D) and functional impairment (WPAI: Hepatitis C Productivity, Daily Activity and Absenteeism) at baseline and throughout treatment in three randomised, double‐blind trials comparing the addition of SMV or PBO during initial 12 weeks of PR. PR was administered for 48 weeks (PBO group) and 24/48 weeks (SMV group) using a response‐guided therapy (RGT) approach. Mean PRO scores (except Absenteeism) worsened from baseline to Week 4 to the same extent in both groups but reverted after Week 24 for SMV/PR and only after Week 48 for PBO/PR. Accordingly, there was a significantly lower area under the curve (baseline–Week 60, AUC60) and fewer weeks with clinically important worsening of scores in the SMV/PR group at any time point. Incidences of patients with fatigue and anaemia AEs were similar in both groups, but FSS scores showed that clinically important increases in fatigue lasted a mean of 6.9 weeks longer with PBO/PR (P < 0.001). PRO score subgroup analysis indicated better outcomes for patients who met the criteria for RGT or achieved sustained virological response 12 weeks post‐treatment (SVR12); differences in mean PRO scores associated with fibrosis level were only observed with PBO/PR. Greater efficacy of SMV/PR enabled reduced treatment duration and reduced time with PR‐related AEs without adding to AE severity.  相似文献   
53.
54.
王丽征 《全科护理》2021,19(3):346-348
对微信平台在住院病人健康教育中的应用现状进行总结,分析其目前成果、平台构建现状与存在的问题,为医院护理人员进行健康宣教提供参考。  相似文献   
55.
突发公共卫生事件应急管理是一个全球性的课题。本文就2019年12月以来发生在中国的新型冠状病毒肺炎这一突发公共卫生事件,口腔医疗机构及其从业人员面临的相关问题进行法律层面的分析与思考,以期对口腔医疗行业应对突发公共卫生事件提供帮助和指导。  相似文献   
56.
57.
58.
59.
《Vaccine》2020,38(1):20-28
During the last few decades, maternal immunization as a strategy to protect young infants from infectious diseases has been increasingly recommended, yet some issues have emerged. Studies have shown that for several vaccines, such as live attenuated, toxoid and conjugated vaccines, high maternal antibody titers inhibit the infant’s humoral immune response after infant vaccination. However, it is not clear whether this decreased antibody titer has any clinical impact on the infant’s protection, as the cellular immune responses are often equally important in providing disease protection and may therefore compensate for diminished antibody levels. Reports describing the effect of maternal antibodies on the cellular immune response after infant vaccination are scarce, probably because such studies are expensive, labor intensive and utilize poorly standardized laboratory techniques. Therefore, this review aims to shed light on what is currently known about the cellular immune responses after infant vaccination in the presence of high (maternal) antibody titers both in animal and human studies. Overall, the findings suggest that maternally derived antibodies do not interfere with the cellular immune responses after infant vaccination. However, more research in humans is clearly needed, as most data originate from animal studies.  相似文献   
60.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号