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   12316篇
  免费   1198篇
  国内免费   17篇
耳鼻咽喉   126篇
儿科学   316篇
妇产科学   402篇
基础医学   1947篇
口腔科学   218篇
临床医学   1044篇
内科学   2480篇
皮肤病学   530篇
神经病学   1233篇
特种医学   420篇
外科学   1615篇
综合类   77篇
一般理论   5篇
预防医学   1226篇
眼科学   134篇
药学   974篇
中国医学   38篇
肿瘤学   746篇
  2023年   118篇
  2022年   101篇
  2021年   198篇
  2020年   180篇
  2019年   234篇
  2018年   280篇
  2017年   268篇
  2016年   273篇
  2015年   315篇
  2014年   329篇
  2013年   634篇
  2012年   667篇
  2011年   632篇
  2010年   406篇
  2009年   338篇
  2008年   544篇
  2007年   487篇
  2006年   554篇
  2005年   505篇
  2004年   537篇
  2003年   446篇
  2002年   403篇
  2001年   334篇
  2000年   337篇
  1999年   310篇
  1998年   148篇
  1997年   105篇
  1996年   122篇
  1995年   132篇
  1994年   104篇
  1993年   90篇
  1992年   222篇
  1991年   233篇
  1990年   206篇
  1989年   232篇
  1988年   214篇
  1987年   200篇
  1986年   183篇
  1985年   184篇
  1984年   162篇
  1983年   115篇
  1982年   103篇
  1981年   77篇
  1979年   115篇
  1978年   85篇
  1977年   90篇
  1976年   72篇
  1974年   75篇
  1973年   72篇
  1954年   88篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
5.
The activity of a rheumatic disease can be influenced by pregnancy and puerperium. Prospective studies have shown an improvement in joint involvement in rheumatoid arthritis in two thirds to three quarters of pregnancies. After birth, an exacerbation is common. In spondylarthropathies there is no relevant change in disease activity. The fetal outcome is not impaired in patients with rheumatoid arthritis and inflammatory spondylarthropathies. Every pregnancy in women with a rheumatic disease should be considered as high-risk, and such pregnancies require close collaboration between rheumatologists and obstetricians.  相似文献   
6.
In a randomised, double-blind study, 20 women with idiopathic detrusor instability and associated symptoms were treated with terodiline 25 mg bd, placebo, and emepronium bromide 200 mg tds--each drug being given for 3 weeks with placebo as wash-out period before cross-over. The results were evaluated according to drug preference, frequency charts and elimination of detrusor instability on cystometry. Serum levels of both drugs were monitored as control of tablet intake. The preference for terodiline to placebo was statistically significant: 14/3 women (P less than 0.05), and the majority of women (12/4) preferred terodiline to emepronium. Terodiline also gave a small but significant reduction in 24 h micturition frequency and eliminated detrusor instability in almost 50% of the patients (P less than 0.05). Side effects were frequent but mild in all three treatment periods. It was concluded that terodiline offers an alternative in the treatment of female detrusor instability.  相似文献   
7.
8.
Two cases are presented in which the cause of small-bowel obstruction was enterolith originating in jejunal diverticula.  相似文献   
9.
To measure prefrontal and subcortical activity during a cognitive task, we examined 19 newly diagnosed schizophrenics and patients with schizophreniform psychosis. Seven healthy volunteers served as controls. The patients were drug naive or had received neuroleptics for a few days only. Cerebral blood flow distribution was depicted by single photon emission computed tomography at rest and during activation with the Wisconsin Card Sorting Test. A significant relative activation deficit in the left inferior-prefrontal region was revealed during the Wisconsin Card Sorting Test in the patient group. Furthermore, the patients had impaired striatal suppression on the left side during the cognitive task. The test performance was significantly impaired in the patients. The inability to reduce striatal activity may be due to a lack of corticostriatal feedback during prefrontal activation.  相似文献   
10.
In a prospective, randomized trial, 104 consecutive patients with displaced femoral neck fractures were allocated either to fixation with a sliding screw plate or 4 ASIF cancellous bone screws. The patients were reexamined at fixed intervals to determine the time of union. The 2-year-cumulated rate of union was 64 per cent in the plate group and 84 per cent in the screw group.  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