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   2700篇
  免费   244篇
  国内免费   22篇
耳鼻咽喉   4篇
儿科学   198篇
妇产科学   46篇
基础医学   327篇
口腔科学   58篇
临床医学   258篇
内科学   644篇
皮肤病学   43篇
神经病学   159篇
特种医学   493篇
外科学   278篇
综合类   38篇
预防医学   143篇
眼科学   19篇
药学   132篇
中国医学   5篇
肿瘤学   121篇
  2022年   9篇
  2021年   28篇
  2020年   29篇
  2019年   49篇
  2018年   40篇
  2017年   35篇
  2016年   42篇
  2015年   55篇
  2014年   55篇
  2013年   95篇
  2012年   68篇
  2011年   88篇
  2010年   105篇
  2009年   87篇
  2008年   83篇
  2007年   92篇
  2006年   88篇
  2005年   75篇
  2004年   80篇
  2003年   81篇
  2002年   65篇
  2001年   54篇
  2000年   68篇
  1999年   65篇
  1998年   141篇
  1997年   124篇
  1996年   126篇
  1995年   95篇
  1994年   75篇
  1993年   88篇
  1992年   44篇
  1991年   44篇
  1990年   30篇
  1989年   65篇
  1988年   47篇
  1987年   57篇
  1986年   52篇
  1985年   50篇
  1984年   32篇
  1983年   38篇
  1982年   42篇
  1981年   26篇
  1980年   40篇
  1979年   23篇
  1978年   23篇
  1977年   21篇
  1976年   32篇
  1975年   26篇
  1974年   11篇
  1969年   8篇
排序方式: 共有2966条查询结果,搜索用时 250 毫秒
1.
2.
3.
BACKGROUND: Our aims in the present study were to estimate the influences of pain and urinary symptoms on quality of life, and to determine which of these two variables has the most predictive power with respect to quality of life in young men with chronic prostatitis-like symptoms. METHODS: Chronic prostatitis-like symptoms were measured by the National Institutes of Health-Chronic Prostatitis Symptom Index. Of the 28,841 men aged 20 years who lived in the study community, 18,495 men (a response rate 64.1%) agreed to participate in the study. A total of 1057 men who complained of symptoms indicative of chronic prostatitis were included in the study. The influences of pain and urinary symptoms on quality of life were determined using logistic regression analysis. The receiver operating characteristic (ROC) curve was used to estimate the predictive ability of each of these variables with respect to quality of life. RESULTS: Results from multivariate analysis showed that both pain and urinary symptoms were associated with an increased likelihood of impaired quality of life, although pain contributed more to a reduced quality of life than urinary symptoms. Relative to men who experienced mild pain, men who experienced moderate pain had a 3.9-fold risk of poor quality of life (odds ratio [OR], 3.87; 95% confidence interval [CI], 2.86-5.23; P < 0.001) and those who experienced severe pain had a 15.7-fold risk of reduced quality of life (OR, 15.68; 95% CI, 6.59-37.35; P < 0.001). Moderate urinary symptoms were associated with a 1.4-fold risk of bother (OR, 1.41; 95% CI, 1.01-1.99; P < 0.001) and severe urinary symptoms were associated with 2.4-fold risk (OR, 2.39; 95% CI, 1.37-4.12; P < 0.001), relative to mild urinary symptoms. Comparison of the effects of pain and urinary symptoms showed that pain severity had the most predictive power for bother, quality of life, and quality-of-life impact. The areas under the ROC curves for bother, quality of life, and quality-of-life impact were 71.3%, 69.3% and 72.5%, respectively. CONCLUSION: Urinary symptoms and pain might be associated with an increased likelihood of impaired quality of life in young men with chronic prostatitis-like symptoms. In addition, our findings suggest that pain severity is the most influential variable for determining quality of life in this population.  相似文献   
4.
5.
A study of some antiparasitic properties of several homoallylamines and related tetrahydroquinolines and quinolines, previously described, was carried out using in vitro activity assays against the epimastigote form of Trypanosoma cruzi and against Trichomonas vaginalis. Unspecific cytotoxicity against murine macrophages was also studied. Although the antichagasic and trichomonacidal activities are not comparable to those of the standard drugs, nifurtimox and metronidazole, some of the compounds exhibit an interesting specific antiparasitic activity.  相似文献   
6.
7.
Evaluation of an on-line patient exposure meter in neuroradiology   总被引:1,自引:0,他引:1  
  相似文献   
8.
Pediatric knee MR imaging: pattern of injuries in the immature skeleton   总被引:3,自引:0,他引:3  
  相似文献   
9.
10.
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