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   2630篇
  免费   195篇
  国内免费   22篇
耳鼻咽喉   1篇
儿科学   251篇
妇产科学   68篇
基础医学   286篇
口腔科学   68篇
临床医学   246篇
内科学   618篇
皮肤病学   33篇
神经病学   127篇
特种医学   489篇
外科学   177篇
综合类   37篇
一般理论   1篇
预防医学   169篇
眼科学   20篇
药学   103篇
中国医学   3篇
肿瘤学   150篇
  2021年   19篇
  2020年   22篇
  2018年   39篇
  2017年   25篇
  2016年   35篇
  2015年   44篇
  2014年   45篇
  2013年   83篇
  2012年   68篇
  2011年   59篇
  2010年   92篇
  2009年   70篇
  2008年   60篇
  2007年   43篇
  2006年   50篇
  2005年   45篇
  2004年   46篇
  2003年   37篇
  2002年   45篇
  2001年   40篇
  2000年   48篇
  1999年   64篇
  1998年   149篇
  1997年   134篇
  1996年   129篇
  1995年   96篇
  1994年   83篇
  1993年   96篇
  1992年   53篇
  1991年   45篇
  1990年   34篇
  1989年   75篇
  1988年   65篇
  1987年   72篇
  1986年   64篇
  1985年   74篇
  1984年   36篇
  1983年   44篇
  1982年   55篇
  1981年   32篇
  1980年   44篇
  1979年   36篇
  1978年   35篇
  1977年   33篇
  1976年   41篇
  1975年   32篇
  1974年   18篇
  1972年   19篇
  1971年   18篇
  1969年   22篇
排序方式: 共有2847条查询结果,搜索用时 15 毫秒
1.
2.
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   
3.
The content of rhodopsin in the eyes of 15 donors (30 eyes) was determined. Both retinal and pigment epithelial fractions were collected from each globe, extracted using 1% CTAB, and the rhodopsin difference spectrum of each fraction was obtained separately. The total amount of rhodopsin, obtained by summing the amounts recovered from the retinal and PE fractions, ranged from 2.00 to 11.94 (median: 6.40) nmoles/eye. Previously reported mean values of about 3.5 to 4.0 nmoles per retina have been obtained using a variety of methods. The present higher values, perhaps largely dependent on procedural details described herein, appear plausible given the known concentrations of rhodopsin in rod outer segments, rod outer segment volumes, and number of rods in the human retina.  相似文献   
4.
5.
6.
Evaluation of an on-line patient exposure meter in neuroradiology   总被引:1,自引:0,他引:1  
  相似文献   
7.
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   
8.
9.
10.
Carney's triad     
A 26 year old female presented with partial expression of Carney's triad. This is the first Australian report of the condition. The role of surgery and the need for vigilance to detect the occurrence of the complete triad are stressed.  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