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   1760229篇
  免费   127044篇
  国内免费   3859篇
耳鼻咽喉   22610篇
儿科学   57673篇
妇产科学   47653篇
基础医学   250984篇
口腔科学   50696篇
临床医学   157840篇
内科学   344680篇
皮肤病学   40209篇
神经病学   138227篇
特种医学   66462篇
外国民族医学   242篇
外科学   265738篇
综合类   39185篇
现状与发展   4篇
一般理论   585篇
预防医学   129254篇
眼科学   41547篇
药学   128013篇
  7篇
中国医学   4575篇
肿瘤学   104948篇
  2021年   13861篇
  2019年   14608篇
  2018年   21616篇
  2017年   16581篇
  2016年   18323篇
  2015年   20455篇
  2014年   27986篇
  2013年   41000篇
  2012年   56670篇
  2011年   59793篇
  2010年   34975篇
  2009年   32294篇
  2008年   55591篇
  2007年   58953篇
  2006年   59078篇
  2005年   56296篇
  2004年   54291篇
  2003年   51706篇
  2002年   49700篇
  2001年   93684篇
  2000年   95899篇
  1999年   78291篇
  1998年   20294篇
  1997年   17760篇
  1996年   17747篇
  1995年   17051篇
  1994年   15601篇
  1993年   14369篇
  1992年   57638篇
  1991年   55484篇
  1990年   53163篇
  1989年   51007篇
  1988年   46319篇
  1987年   45144篇
  1986年   42426篇
  1985年   40239篇
  1984年   29638篇
  1983年   25149篇
  1982年   14140篇
  1979年   25738篇
  1978年   17738篇
  1977年   15086篇
  1976年   14060篇
  1975年   14716篇
  1974年   17754篇
  1973年   17109篇
  1972年   15772篇
  1971年   14538篇
  1970年   13512篇
  1969年   12605篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
91.
92.
Abstract

This study is a single-center, retrospective analysis of postmenopausal women presenting with dyspareunia and vulvar pain, aiming to evaluate relative effectiveness of vestibular CO2 laser therapy as a treatment. Three monthly sessions of laser were performed to each patient and thereafter a three-months follow-up was stablished. A total number of 72 patients undergoing vestibular laser treatment were recruited from patient files in the period between 2016 and 2018. Among these, 39 women also received a concomitant treatment with ospemifene (60?mg/day) during the study period. There was a statistically significant reduction of all the symptoms in both groups up to the three month follow-up. Regarding dryness and dyspareunia, the relief tent to be more prominent in the ospemifene?+?laser group at all follow-ups and remained statistically significant at three-month follow-up. Specifically, vestibular dryness was significantly lower in the ospemifene?+?laser group compared with the laser treatment group (?87% vs???34%, respectively), and the vestibular health score started declining faster in the ospemifene?+?laser group. Although, additional research is needed to understand the mechanism of action, our data shows that a combination regimen of laser and ospemifene may improve clinical effectiveness for long-term treatment of symptoms associated with the under-recognized genitourinary syndrome of menopause.  相似文献   
93.
94.
95.

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   
96.
97.
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   

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