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   12341篇
  免费   883篇
  国内免费   40篇
耳鼻咽喉   77篇
儿科学   424篇
妇产科学   393篇
基础医学   1627篇
口腔科学   185篇
临床医学   1496篇
内科学   2514篇
皮肤病学   359篇
神经病学   1268篇
特种医学   258篇
外科学   1051篇
综合类   89篇
一般理论   10篇
预防医学   1564篇
眼科学   237篇
药学   778篇
  1篇
中国医学   26篇
肿瘤学   907篇
  2024年   17篇
  2023年   152篇
  2022年   294篇
  2021年   573篇
  2020年   326篇
  2019年   485篇
  2018年   525篇
  2017年   368篇
  2016年   325篇
  2015年   364篇
  2014年   509篇
  2013年   735篇
  2012年   1039篇
  2011年   1048篇
  2010年   548篇
  2009年   491篇
  2008年   774篇
  2007年   823篇
  2006年   730篇
  2005年   671篇
  2004年   615篇
  2003年   572篇
  2002年   427篇
  2001年   72篇
  2000年   48篇
  1999年   65篇
  1998年   72篇
  1997年   58篇
  1996年   50篇
  1995年   51篇
  1994年   33篇
  1993年   36篇
  1992年   19篇
  1991年   15篇
  1990年   29篇
  1989年   19篇
  1988年   19篇
  1987年   20篇
  1986年   11篇
  1985年   19篇
  1984年   12篇
  1983年   22篇
  1982年   29篇
  1981年   17篇
  1980年   18篇
  1979年   11篇
  1978年   20篇
  1977年   13篇
  1976年   8篇
  1973年   14篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.

Background  

Pneumococcal diseases remain a major cause of morbidity and mortality worldwide. Updated data on drug-resistance from different populations may be important to recognize changes in disease patterns. This study assessed current levels of penicilin resistance among Streptococcus Pneumoniae causing pneumonia in Spanish middle age and older adults.  相似文献   
6.
Rising malpractice rates and damages to finances and reputations caused by litigation are leading risk managers to seek new solutions to reduce the frequency and severity of malpractice. Any effort to meet the challenges of malpractice must consider three areas: the informed consent process, expectation management and physician communication. Technology is emerging as an important tool that can help risk managers better address these critical areas. This article explores the realities of malpractice today — specifically the factors behind the majority of cases and discusses how new tools can help risk managers.  相似文献   
7.
8.
This study examined the use and effectiveness of the Alert assessment form. The form is part of the Alert system, used by one large acute care hospital to identify patients with a propensity for violence. All reported incidents of patient violence from August 1, 2003, through December 31, 2004, were included in patient charts. One hundred seventeen violent patient charts were reviewed and compared with 161 non-violent patient charts, randomly chosen from the same time period. Overall use of the Alert assessment form for violent and non-violent patients was 75.7% and 35.4%, respectively. The assessment form was found to have moderate sensitivity (71%) and high specificity (94%). It is reasonably effective in identifying potentially violent or aggressive patients when it is used according to protocol. Efforts to improve the tool are warranted, as is evaluation of its benefit in settings with low prevalence of violence. Also, greater effort must be taken to prevent violence once an aggressive patient has been identified.  相似文献   
9.
10.
We have developed a guar wholemeal bread and tested its physiological efficacy and sensory qualities. The objective of the study was to estimate the optimum concentration of guar in bread required to reduce postprandial glycaemia and insulinaemia without adversely affecting the quality of the bread. Following overnight fasts, 15 normal weight, non-diabetic subjects consumed meals of wholemeal bread alone (controls) and supplemented with guar at three different concentrations (5, 10 and 15% replacement of wheat flour). Blood samples for glucose and insulin analysis were taken preprandially, and at 30 and 60 min after the start of each meal. The acceptability of the wholemeal control and guar breads was assessed using a hedonic scaling method. A significantly lower blood glucose rise at 30 min was found after the 15% guar bread meal compared to the control. Plasma insulin responses at 30 and 60 min were significantly lower after the 10 and 15% guar bread meals compared to the controls. Hedonic scores indicated that the subjects found the 5 and 10% guar breads acceptable and in the case of the 5% variety the mean score was identical to the control. We suggest that a guar concentration of between 5 and 10% replacement of wheat flour (wholemeal or white) should be used for the baking of guar wholemeal bread but further work is needed to define the precise quantity of guar required.  相似文献   
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