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   2895554篇
  免费   218712篇
  国内免费   5458篇
耳鼻咽喉   39036篇
儿科学   95426篇
妇产科学   80158篇
基础医学   410883篇
口腔科学   85928篇
临床医学   259986篇
内科学   559151篇
皮肤病学   63779篇
神经病学   229501篇
特种医学   112328篇
外国民族医学   698篇
外科学   438752篇
综合类   70379篇
现状与发展   6篇
一般理论   1030篇
预防医学   221559篇
眼科学   68645篇
药学   215346篇
  9篇
中国医学   6372篇
肿瘤学   160752篇
  2018年   30457篇
  2017年   23461篇
  2016年   25891篇
  2015年   29630篇
  2014年   41141篇
  2013年   61446篇
  2012年   84273篇
  2011年   88809篇
  2010年   52587篇
  2009年   49465篇
  2008年   83513篇
  2007年   88594篇
  2006年   89462篇
  2005年   86219篇
  2004年   84052篇
  2003年   80331篇
  2002年   77904篇
  2001年   141086篇
  2000年   145142篇
  1999年   121504篇
  1998年   32953篇
  1997年   29340篇
  1996年   29277篇
  1995年   28261篇
  1994年   26322篇
  1993年   24483篇
  1992年   96317篇
  1991年   93521篇
  1990年   90701篇
  1989年   87465篇
  1988年   80586篇
  1987年   79004篇
  1986年   75076篇
  1985年   72029篇
  1984年   53400篇
  1983年   45862篇
  1982年   26460篇
  1981年   23697篇
  1979年   49503篇
  1978年   34180篇
  1977年   29018篇
  1976年   27242篇
  1975年   28838篇
  1974年   35206篇
  1973年   33795篇
  1972年   31246篇
  1971年   29310篇
  1970年   27107篇
  1969年   25395篇
  1968年   23386篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
142.

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   
143.
144.
145.
146.
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   

147.
148.
149.
150.
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