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   2077798篇
  免费   142689篇
  国内免费   4155篇
耳鼻咽喉   26919篇
儿科学   67828篇
妇产科学   55785篇
基础医学   306090篇
口腔科学   58248篇
临床医学   186916篇
内科学   401244篇
皮肤病学   47368篇
神经病学   156061篇
特种医学   78362篇
外国民族医学   293篇
外科学   313810篇
综合类   44558篇
现状与发展   5篇
一般理论   620篇
预防医学   153421篇
眼科学   49278篇
药学   152460篇
  8篇
中国医学   5138篇
肿瘤学   120230篇
  2019年   16157篇
  2018年   23789篇
  2017年   17973篇
  2016年   19910篇
  2015年   22535篇
  2014年   31155篇
  2013年   45322篇
  2012年   63654篇
  2011年   67484篇
  2010年   39752篇
  2009年   36994篇
  2008年   62557篇
  2007年   67078篇
  2006年   67110篇
  2005年   64078篇
  2004年   61945篇
  2003年   59100篇
  2002年   56960篇
  2001年   106242篇
  2000年   108398篇
  1999年   89436篇
  1998年   23383篇
  1997年   20418篇
  1996年   20437篇
  1995年   19623篇
  1994年   17906篇
  1993年   16637篇
  1992年   67276篇
  1991年   66166篇
  1990年   64159篇
  1989年   61705篇
  1988年   56382篇
  1987年   55139篇
  1986年   51807篇
  1985年   49247篇
  1984年   36223篇
  1983年   30777篇
  1982年   17043篇
  1979年   32363篇
  1978年   22505篇
  1977年   18849篇
  1976年   18069篇
  1975年   19703篇
  1974年   23415篇
  1973年   22566篇
  1972年   20889篇
  1971年   19484篇
  1970年   18166篇
  1969年   16932篇
  1968年   15896篇
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
81.

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   
82.
83.
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   

84.
85.
86.
87.
88.
89.
90.
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