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   6153篇
  免费   284篇
  国内免费   84篇
耳鼻咽喉   70篇
儿科学   74篇
妇产科学   135篇
基础医学   803篇
口腔科学   90篇
临床医学   493篇
内科学   1353篇
皮肤病学   95篇
神经病学   445篇
特种医学   440篇
外科学   892篇
综合类   24篇
预防医学   173篇
眼科学   62篇
药学   658篇
中国医学   95篇
肿瘤学   619篇
  2023年   30篇
  2022年   100篇
  2021年   212篇
  2020年   99篇
  2019年   146篇
  2018年   155篇
  2017年   141篇
  2016年   190篇
  2015年   256篇
  2014年   294篇
  2013年   340篇
  2012年   522篇
  2011年   519篇
  2010年   357篇
  2009年   237篇
  2008年   392篇
  2007年   360篇
  2006年   314篇
  2005年   288篇
  2004年   249篇
  2003年   204篇
  2002年   154篇
  2001年   138篇
  2000年   143篇
  1999年   106篇
  1998年   52篇
  1997年   41篇
  1996年   33篇
  1995年   30篇
  1994年   21篇
  1993年   18篇
  1992年   36篇
  1991年   37篇
  1990年   36篇
  1989年   29篇
  1988年   25篇
  1987年   30篇
  1986年   20篇
  1985年   25篇
  1984年   15篇
  1983年   16篇
  1981年   9篇
  1980年   7篇
  1979年   10篇
  1978年   8篇
  1976年   7篇
  1973年   8篇
  1971年   7篇
  1969年   7篇
  1966年   7篇
排序方式: 共有6521条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
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   
7.
8.
Accurate assessment and replacement of blood loss and fluid–electrolyte deficit during craniosynostosis repair is difficult owing to patient size and the diversity of surgical technique. Forty-three patients undergoing primary craniosynostosis repair over a 10-year period were studied retrospectively to determine blood loss and fluid deficit and to assess blood transfusion practices during both intraoperative and postoperative periods. Blood loss was calculated on the basis of estimated red cell mass (ERCM) and fluid-electrolyte imbalance was investigated with blood samplings. Blood transfusion was considered appropriate if the postoperative or posttransfusion ERCM was within 12% of the preoperative value. Estimated fluid requirement (EFR) was used in 4 ml kg–1 h–1 except for neonates. Intraoperatively, 80% of all patients were appropriately managed with respect to blood transfusion and EFR. Postoperatively only 20% of the patients receiving transfusions were transfused appropriately. In 23.3% of these patients (10/43) unexpected respiratory distress developed immediately after their recovery from the anesthesia. With the measurement of estimated blood volume and allowable blood loss, appropriate transfusion could be achieved for the successful treatment of the primary craniosynostosis. Received: 16 February 1998  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