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   2379740篇
  免费   175595篇
  国内免费   4394篇
耳鼻咽喉   35272篇
儿科学   77408篇
妇产科学   67333篇
基础医学   335888篇
口腔科学   67854篇
临床医学   205019篇
内科学   469390篇
皮肤病学   53094篇
神经病学   188077篇
特种医学   95358篇
外国民族医学   1056篇
外科学   368033篇
综合类   53665篇
现状与发展   7篇
一般理论   763篇
预防医学   172420篇
眼科学   55133篇
药学   178626篇
  5篇
中国医学   5015篇
肿瘤学   130313篇
  2018年   22714篇
  2016年   19411篇
  2015年   21978篇
  2014年   30762篇
  2013年   46919篇
  2012年   63227篇
  2011年   66997篇
  2010年   40014篇
  2009年   38415篇
  2008年   64151篇
  2007年   69437篇
  2006年   69944篇
  2005年   67995篇
  2004年   66483篇
  2003年   64452篇
  2002年   63357篇
  2001年   113938篇
  2000年   117759篇
  1999年   99932篇
  1998年   26996篇
  1997年   24443篇
  1996年   24274篇
  1995年   22980篇
  1994年   21594篇
  1993年   20150篇
  1992年   78358篇
  1991年   76304篇
  1990年   74497篇
  1989年   72034篇
  1988年   66779篇
  1987年   65784篇
  1986年   62179篇
  1985年   59260篇
  1984年   44445篇
  1983年   37599篇
  1982年   22155篇
  1981年   20179篇
  1979年   41381篇
  1978年   29107篇
  1977年   25033篇
  1976年   23000篇
  1975年   25672篇
  1974年   30225篇
  1973年   29229篇
  1972年   27621篇
  1971年   25495篇
  1970年   24153篇
  1969年   22735篇
  1968年   21073篇
  1967年   18918篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
71.
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   
72.
73.
74.
As millions of people turn to social media for health information, better understanding the factors that guide health-related judgments and perceptions in this context is imperative. We report on two Web experiments (n > 400 total) examining the power of society’s widespread weight bias and related stereotypes to influence nutrition judgments in social media spaces. In Experiment 1, meals were judged as lower in nutritional quality when the person who recommended them (the source) was depicted as obese rather than of normal weight, an effect mediated by stereotypic beliefs about the source as a generally unhealthy person. Experiment 2 replicated this effect, which—notably—remained significant when controlling for objective nutritional information (calories and fat content). Results highlight spillover effects of weight bias that extend beyond person perception to color impressions of objects (here, food) that are associated with stigmatized attributes. Implications for everyday nutrition judgments and public health are considered.  相似文献   
75.
76.
77.
78.
79.
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   
80.
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