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   370106篇
  免费   63179篇
  国内免费   11285篇
耳鼻咽喉   2583篇
儿科学   11543篇
妇产科学   2547篇
基础医学   47507篇
口腔科学   9018篇
临床医学   43886篇
内科学   93601篇
皮肤病学   6566篇
神经病学   24594篇
特种医学   11786篇
外国民族医学   30篇
外科学   38388篇
综合类   46053篇
现状与发展   55篇
一般理论   13篇
预防医学   24454篇
眼科学   2915篇
药学   36429篇
  181篇
中国医学   19722篇
肿瘤学   22699篇
  2024年   626篇
  2023年   4550篇
  2022年   7634篇
  2021年   12975篇
  2020年   16172篇
  2019年   20235篇
  2018年   19311篇
  2017年   20761篇
  2016年   20909篇
  2015年   20858篇
  2014年   27855篇
  2013年   29380篇
  2012年   25529篇
  2011年   27059篇
  2010年   22319篇
  2009年   18331篇
  2008年   18665篇
  2007年   17507篇
  2006年   16149篇
  2005年   14569篇
  2004年   12592篇
  2003年   11255篇
  2002年   9424篇
  2001年   8062篇
  2000年   6005篇
  1999年   4220篇
  1998年   3460篇
  1997年   3151篇
  1996年   2895篇
  1995年   2611篇
  1994年   2322篇
  1993年   1841篇
  1992年   1687篇
  1991年   1396篇
  1990年   1180篇
  1989年   1117篇
  1988年   1004篇
  1987年   802篇
  1986年   712篇
  1985年   1141篇
  1984年   1016篇
  1983年   753篇
  1982年   805篇
  1981年   724篇
  1980年   603篇
  1979年   521篇
  1978年   444篇
  1977年   330篇
  1976年   362篇
  1975年   245篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
We report two British cases of liver abscess, due to Klebsiella pneumoniae and associated with synchronous infection elsewhere, which required liver resection for definitive treatment. They illustrate the geographic spread of aggressive K pneumoniae liver infection and demonstrate the importance of early aggressive treatment.  相似文献   
52.
53.
54.
55.
56.
《Vaccine》2020,38(45):7118-7128
IntroductionToward the Global Vaccine Action Plan 2020 goal, almost 90% of countries have established a National Immunization Technical Advisory Group (NITAG). However, little is known about NITAG's contributions to governance.MethodsIn 2017–2018, a two-step, qualitative retrospective study was conducted. Jordan (JO), Argentina (AR), and South Africa (SA) were selected owing to government-financed NITAGs from middle-income countries (MICs), geographic diversity, and a vaccine introduction with NITAG support. Country case studies were developed, collecting data through desk review and face-to-face key informant interviews (KIIs) from Ministry of Health (MoH) and NITAG. Case studies were analyzed together, to assess governance applying the European Observatory on Health Systems and Policies framework focusing on transparency, accountability, participation, integrity, and policy capacity (TAPIC).ResultsDocument review and 53 KII (22 AR, 20 SA, 11 JO) showed NITAGs played a pivotal role as advisors promoting a culture of evidence-informed policies. NITAGs strengthened governance, although practices varied among countries. Meetings were conducted behind-closed-doors, participation restricted to members, only in one country agendas, and recommendations were public (AR). To increase participation, policy capacity, and transparency, countries considered adding experts in communications, advocacy, and economics. AR and SA contemplated including community members. NITAGs functioned autonomously from the government, with no established internal or external monitoring or supervision. NITAG meeting minutes allowed the review of integrity, adherence to terms of reference, standard operating procedures, and conflict of interest (CoI). For the most part, NITAGs abided by their mandates. Significant issues were related to the level of MoH support and oversight of CoI declaration and documentation.ConclusionsSystematically implementing governance approaches could improve processes, better tailor policies, and implementation. The long-term survival and resilience of NITAGs in these countries showed they play a significant role in strengthening governance. Lessons learned could be useful to those promoting country-driven evidence-informed decision-making.  相似文献   
57.
This paper describes country-wide special measures undertaken for interventional radiology staff during the current coronavirus disease 2019 (COVID-19) pandemic. Although each interventional radiology service around the world faces unique challenges, the principles outlined in this article will be useful when designing or strengthening individual practices and integrating them within wider hospital and national measures. Moving beyond the current outbreak, these measures will be useful for any future infectious diseases which are likely to arise.  相似文献   
58.
59.
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