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   5633篇
  免费   376篇
  国内免费   20篇
耳鼻咽喉   88篇
儿科学   187篇
妇产科学   109篇
基础医学   700篇
口腔科学   80篇
临床医学   568篇
内科学   1000篇
皮肤病学   61篇
神经病学   701篇
特种医学   224篇
外科学   612篇
综合类   234篇
一般理论   7篇
预防医学   576篇
眼科学   171篇
药学   461篇
  1篇
中国医学   2篇
肿瘤学   247篇
  2023年   58篇
  2022年   156篇
  2021年   266篇
  2020年   111篇
  2019年   184篇
  2018年   208篇
  2017年   151篇
  2016年   176篇
  2015年   157篇
  2014年   217篇
  2013年   289篇
  2012年   313篇
  2011年   280篇
  2010年   214篇
  2009年   184篇
  2008年   218篇
  2007年   214篇
  2006年   213篇
  2005年   196篇
  2004年   162篇
  2003年   144篇
  2002年   156篇
  2001年   109篇
  2000年   142篇
  1999年   131篇
  1998年   53篇
  1997年   42篇
  1996年   27篇
  1995年   28篇
  1994年   40篇
  1993年   32篇
  1992年   80篇
  1991年   68篇
  1990年   63篇
  1989年   69篇
  1988年   50篇
  1987年   60篇
  1986年   65篇
  1985年   57篇
  1984年   54篇
  1983年   38篇
  1982年   49篇
  1981年   31篇
  1980年   33篇
  1979年   33篇
  1977年   27篇
  1976年   24篇
  1975年   26篇
  1974年   28篇
  1968年   22篇
排序方式: 共有6029条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
Aims: On the Edge is a mental health education programme designed to support early intervention by increasing knowledge and understanding of early psychosis, reducing the stigma associated with mental health issues and improving awareness of avenues of help. The target audience was young people aged 14–22 years in schools and colleges. Methods: An interactive drama programme was developed through collaborative working across psychiatry, applied drama and those with direct experience of psychosis. A national tour engaged 2500 students in 71 performances that took place in 51 schools and colleges. The programme was evaluated against its aims with data collected both during and after the tour. Results: Quantitative and qualitative evaluation found significant gains with respect to all three aims. Thirty‐one schools developed supportive links with local mental health services. Conclusions: This programme shows the value and effectiveness of delivering health education on early psychosis through the medium of applied drama, and offers a model for a programme that can be incorporated into early intervention services. Lessons learned through delivering this programme are a valuable contribution towards future developments of mental health education programmes for schools.  相似文献   
7.
While much time has been spent deliberating about the definition of play, little emphasis has been placed on what children themselves perceive as play. The aim of the present study was to examine social context as a cue for children's perceptions of play and learning. Ninety-two children aged between four and six years (mean four years nine months) participated in the study and completed the Activity Apperception Story Procedure. Children were asked to sort photographic stimuli into those they believed depicted play/not play and learning/not learning. Each of the stimuli were identified by independent raters as containing one of the following social cues; teacher absence (solitary activity, parallel activity or cooperative activity) or teacher presence (teacher involved activity or teacher directed activity). Findings revealed that children associated teacher absence with play. More specifically, children made links between play and the presence of peers (parallel and cooperative activity). Findings are discussed in relation to play in the early years curriculum, differences in children's early educational experiences and the importance of understanding children's perceptions of play.  相似文献   
8.
OBJECTIVES: To investigate the in vitro effects of Sodium Tetradecyl Sulphate (STS) and Polidocanol (POL) on clotting tests, clotting factors, platelets and microparticles. MATERIALS AND METHODS: Platelet rich (PRP) and platelet poor (PPP) plasmas were incubated with varying concentrations of STS and POL. Clotting tests, platelet/plasma turbidity, and microparticle studies were performed. Specimens were mixed with individual factor deficient plasmas and clotting factor activities were studied. RESULTS: STS at high concentrations (>0.3%) destroyed platelets, microparticles and the clotting factors V, VII and X. It prolonged all clotting tests including prothrombin time (PT), activated partial thromboplastin time (APTT), non-activated partial thromboplastin time (NAPTT), thrombin time (TT), factor Xa clotting time (XACT) and surface activated clotting time (SACT). Higher concentrations of POL were required to achieve some anticoagulant activity. Low sclerosant concentrations shortened XACT and SACT, and induced release of procoagulant platelet derived microparticles. Increased exposure time resulted in increased procoagulant activity. STS at concentrations higher than 0.5% precipitated a complex containing apolipoprotein b and fibrinogen. CONCLUSIONS: Detergent sclerosants affect the clotting mechanism by interfering with clotting factor activities, procoagulant phospholipids and platelet derived microparticles. STS has more anticoagulant activity than POL in high concentrations. Low concentration sclerosants demonstrate procoagulant activity.  相似文献   
9.
We examined the possible unintended consequences of a 72-hour automatic order to discontinue vancomycin therapy in an antimicrobial stewardship program (ASP). Of 120 patients, 11 had vancomycin therapy discontinued at 72 hours without a call to the ASP, and 7 experienced a treatment interruption of 6-36 hours. All discontinuation of therapy was considered appropriate, and the 7 treatment interruptions did not have clear clinical consequences. Only one-third of patients had ASP stickers that warned of impending discontinuation of vancomycin therapy placed appropriately in the medical record.  相似文献   
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