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   2439篇
  免费   167篇
  国内免费   23篇
耳鼻咽喉   1篇
儿科学   179篇
妇产科学   29篇
基础医学   261篇
口腔科学   57篇
临床医学   246篇
内科学   493篇
皮肤病学   24篇
神经病学   139篇
特种医学   488篇
外科学   246篇
综合类   37篇
一般理论   2篇
预防医学   109篇
眼科学   14篇
药学   137篇
中国医学   4篇
肿瘤学   163篇
  2021年   23篇
  2020年   12篇
  2019年   15篇
  2018年   25篇
  2017年   17篇
  2016年   28篇
  2015年   30篇
  2014年   39篇
  2013年   83篇
  2012年   45篇
  2011年   69篇
  2010年   90篇
  2009年   62篇
  2008年   69篇
  2007年   45篇
  2006年   71篇
  2005年   45篇
  2004年   45篇
  2003年   35篇
  2002年   40篇
  2001年   39篇
  2000年   50篇
  1999年   51篇
  1998年   144篇
  1997年   131篇
  1996年   142篇
  1995年   93篇
  1994年   77篇
  1993年   89篇
  1992年   41篇
  1991年   41篇
  1990年   42篇
  1989年   78篇
  1988年   61篇
  1987年   71篇
  1986年   66篇
  1985年   70篇
  1984年   47篇
  1983年   48篇
  1982年   38篇
  1981年   29篇
  1980年   49篇
  1979年   24篇
  1978年   32篇
  1977年   35篇
  1976年   32篇
  1975年   31篇
  1973年   13篇
  1972年   12篇
  1971年   10篇
排序方式: 共有2629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.
Borderline personality disorder is common in treatment settings and may be so in the general population. In this guide to assessment strategies for diagnosing borderline personality disorder, the authors discuss the reliability and validity of structured interviews and self-report instruments and suggest the use of a self-report questionnaire as a cost-effective screening test. Assessment problems, such as the need for longitudinal observation, are reviewed. Essential features of the recommended diagnostic approach include clarity about the diagnostic concept, consideration of the full range of diagnostic criteria, incorporation of recently developed diagnostic methodologies, care in distinguishing personality disorders from comorbid axis I syndromes, and complete assessment of the full range of axis II disorders.  相似文献   
4.
5.
A New York court recently struck down state Office of Mental Health regulations governing research involving subjects with impaired decisionmaking capacity. The court held that neither incapacitated adults nor minors could participate in any research protocol that contained a nontherapeutic element, irrespective of possible benefits to the subject or the importance of the knowledge to be gained. Although the decision rested on a technical point of law and dealt only with psychiatric research, the court's holding has significantly broader implications.  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