首页 | 官方网站   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   1417632篇
  免费   107154篇
  国内免费   2563篇
医药卫生   1527349篇
  2021年   10965篇
  2019年   11855篇
  2018年   16261篇
  2017年   12413篇
  2016年   13685篇
  2015年   15510篇
  2014年   21651篇
  2013年   32253篇
  2012年   45158篇
  2011年   47818篇
  2010年   28428篇
  2009年   27208篇
  2008年   45291篇
  2007年   48378篇
  2006年   48504篇
  2005年   47494篇
  2004年   45898篇
  2003年   44149篇
  2002年   43156篇
  2001年   65678篇
  2000年   67882篇
  1999年   58083篇
  1998年   16829篇
  1997年   15116篇
  1996年   15344篇
  1995年   14543篇
  1994年   13732篇
  1993年   12681篇
  1992年   45561篇
  1991年   44340篇
  1990年   42986篇
  1989年   40858篇
  1988年   37581篇
  1987年   36901篇
  1986年   34281篇
  1985年   32956篇
  1984年   24871篇
  1983年   20910篇
  1982年   12502篇
  1981年   11416篇
  1979年   21888篇
  1978年   15367篇
  1977年   12976篇
  1976年   12124篇
  1975年   12993篇
  1974年   15069篇
  1973年   14495篇
  1972年   13282篇
  1971年   11987篇
  1970年   11300篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
Haemophilia is a common cause of genetically inherited bleeding disorders. Pseudotumours occur in 1–2 % of persons with severe forms of haemophilia. These are a result of repeated haemorrhage into soft tissues, subperiosteum or a site of bone fracture with inadequate resorption of the extravasated blood. There are a number of therapeutic alternatives for this dangerous condition: surgical removal, percutaneous management, irradiation, embolization etc. In this case report, we describe the natural history, clinical course and successful surgical management of a patient with haemophilia who presented with a massive pseudotumour. We also briefly review the relevant literature on the various therapeutic modalities that have been implemented in the management of this rare complication. Though surgeons may be averse to operate on haemophiliacs, primary surgical management as done in our case may prove to be the definitive treatment option for such patients.  相似文献   
6.
7.
Past research suggests that as many as 50% of onward human immunodeficiency virus (HIV) transmissions occur during acute and recent HIV infection. It is clearly important to develop interventions which focus on this highly infectious stage of HIV infection to prevent further transmission in the risk networks of acutely and recently infected individuals. Project Protect tries to find recently and acutely infected individuals and prevents HIV transmission in their risk networks. Participants are recruited by community health outreach workers at community-based HIV testing sites and drug users' community venues, by coupon referrals and through referrals from AIDS clinics. When a network with acute/recent infection is identified, network members are interviewed about their risky behaviors, network information is collected, and blood is drawn for HIV testing. Participants are also educated and given prevention materials (condoms, syringes, educational materials); HIV-infected participants are referred to AIDS clinics and are assisted with access to care. Community alerts about elevated risk of HIV transmission are distributed within the risk networks of recently infected. Overall, 342 people were recruited to the project and screened for acute/recent HIV infection. Only six index cases of recent infection (2.3% of all people screened) were found through primary screening at voluntary counseling and testing (VCT) sites, but six cases of recent infection were found through contact tracing of these recently infected participants (7% of network members who came to the interview). Combining screening at VCT sites and contact tracing the number of recently infected people we located as compared to VCT screening alone. No adverse events were encountered. These first results provide evidence for the theory behind the intervention, i.e., in the risk networks of recently infected people there are other people with recent HIV infection and they can be successfully located without increasing stigma for project participants.  相似文献   
8.
9.
10.
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-23

京公网安备 11010802026262号