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   1700137篇
  免费   123582篇
  国内免费   3837篇
耳鼻咽喉   21786篇
儿科学   55725篇
妇产科学   46226篇
基础医学   241793篇
口腔科学   48820篇
临床医学   151693篇
内科学   334675篇
皮肤病学   38741篇
神经病学   131566篇
特种医学   64071篇
外国民族医学   242篇
外科学   257945篇
综合类   38968篇
现状与发展   4篇
一般理论   536篇
预防医学   124421篇
眼科学   40267篇
药学   123860篇
  7篇
中国医学   4481篇
肿瘤学   101729篇
  2021年   12967篇
  2019年   13661篇
  2018年   20106篇
  2017年   15329篇
  2016年   16755篇
  2015年   19104篇
  2014年   26380篇
  2013年   38207篇
  2012年   53156篇
  2011年   55761篇
  2010年   32977篇
  2009年   30855篇
  2008年   51849篇
  2007年   55061篇
  2006年   55516篇
  2005年   52788篇
  2004年   50966篇
  2003年   48343篇
  2002年   46537篇
  2001年   91826篇
  2000年   93644篇
  1999年   77003篇
  1998年   19751篇
  1997年   17288篇
  1996年   17408篇
  1995年   16757篇
  1994年   15310篇
  1993年   14089篇
  1992年   57404篇
  1991年   55286篇
  1990年   52990篇
  1989年   50761篇
  1988年   46140篇
  1987年   44951篇
  1986年   42240篇
  1985年   40001篇
  1984年   29360篇
  1983年   24918篇
  1982年   13905篇
  1979年   25538篇
  1978年   17576篇
  1977年   14912篇
  1976年   13879篇
  1975年   14566篇
  1974年   17635篇
  1973年   16947篇
  1972年   15676篇
  1971年   14455篇
  1970年   13431篇
  1969年   12517篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.

Introduction The focus in clinical pharmacy practice is and has for the last 30–35 years been on changing the role of pharmacy staff into service orientation and patient counselling. One way of doing this is by involving staff in change process and as a researcher to take part in the change process by establishing partnerships with staff. On the background of the authors’ widespread action research (AR)-based experiences, recommendations and comments for how to conduct an AR-study is described, and one of their AR-based studies illustrate the methodology and the research methods used. Methodology AR is defined as an approach to research which is based on a problem-solving relationship between researchers and clients, which aims at both solving a problem and at collaboratively generating new knowledge. Research questions relevant in AR-studies are: what was the working process in this change oriented study? What learning and/or changes took place? What challenges/pitfalls had to be overcome? What were the influence/consequences for the involved parts? When to use If you want to implement new services and want to involve staff and others in the process, an AR methodology is very suitable. The basic advantages of doing AR-based studies are grounded in their participatory and democratic basis and their starting point in problems experienced in practice. Limitations Some of the limitations in AR-studies are that neither of the participants in a project steering group are the only ones to decide. Furthermore, the collective process makes the decision-making procedures relatively complex.

  相似文献   
94.
95.
Women with pre-eclampsia have an increased risk of cardiovascular disease later in life. The aim of the study was to establish the presence and pattern of arterial stiffness in women previously with pre-eclampsia from a semi-rural region of South Africa. This was a prospective longitudinal study which involved 36 previously pre-eclamptic women and 86 non-pregnant controls (NPC) who had a past history of non-complicated pregnancy. Maternal wave reflection (augmentation index) and carotid-femoral pulse wave velocity were assessed noninvasively, using applanation tonometry with the SphygmoCor device. Endothelial function was assessed by EndoPAT 2000 device; pneumatic probes were fitted to the index fingers; induced flow-mediated reactive hyperemia; the ratio of the readings before and after occlusion was then used to calculate the score, the reactive hyperemia index (RHI) as a measure of endothelial function.

Pulse wave velocity remained significantly higher in previously pre-eclamptic women than non-pregnant controls up to three months after delivery (p < 0.05), then it reduced to nonsignificant values. All blood pressure indices (central and brachial pressures), were higher in previously pre-eclamptic women as compared to nonpregnant controls up to one year postpartum.

Regional (aortic) arterial stiffness, though it persists for some time after delivery, is transitory in previously pre-eclamptic women from the rural Africa setting. However, their increase blood pressure is an indication of compromised arterial compliance in women previously with pre-eclampsia.  相似文献   

96.
97.
98.
99.
100.
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