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   2063篇
  免费   220篇
  国内免费   47篇
耳鼻咽喉   3篇
儿科学   96篇
妇产科学   32篇
基础医学   257篇
口腔科学   56篇
临床医学   255篇
内科学   466篇
皮肤病学   24篇
神经病学   114篇
特种医学   133篇
外科学   221篇
综合类   37篇
一般理论   5篇
预防医学   294篇
眼科学   104篇
药学   96篇
  1篇
肿瘤学   136篇
  2023年   12篇
  2022年   17篇
  2021年   27篇
  2020年   24篇
  2019年   36篇
  2018年   33篇
  2017年   45篇
  2016年   31篇
  2015年   41篇
  2014年   49篇
  2013年   78篇
  2012年   81篇
  2011年   97篇
  2010年   63篇
  2009年   43篇
  2008年   83篇
  2007年   114篇
  2006年   89篇
  2005年   71篇
  2004年   68篇
  2003年   76篇
  2002年   94篇
  2001年   74篇
  2000年   67篇
  1999年   62篇
  1998年   68篇
  1997年   76篇
  1996年   75篇
  1995年   62篇
  1994年   46篇
  1993年   39篇
  1992年   32篇
  1991年   36篇
  1990年   44篇
  1989年   35篇
  1988年   46篇
  1987年   45篇
  1986年   38篇
  1985年   33篇
  1984年   15篇
  1983年   17篇
  1982年   17篇
  1981年   9篇
  1980年   12篇
  1978年   6篇
  1977年   14篇
  1976年   9篇
  1975年   16篇
  1974年   12篇
  1973年   6篇
排序方式: 共有2330条查询结果,搜索用时 0 毫秒
1.
2.

Background  

Shoulder disorders are a common health problem in western societies. Several treatment protocols have been developed for the clinical management of persons with shoulder pain. However available evidence does not support any protocol as being superior over others. Systematic reviews provide some evidence that certain physical therapy interventions (i.e. supervised exercises and mobilisation) are effective in particular shoulder disorders (i.e. rotator cuff disorders, mixed shoulder disorders and adhesive capsulitis), but there is an ongoing need for high quality trials of physical therapy interventions. Usually, physical therapy consists of active exercises intended to strengthen the shoulder muscles as stabilizers of the glenohumeral joint or perform mobilisations to improve restricted mobility of the glenohumeral or adjacent joints (shoulder girdle). It is generally accepted that a-traumatic shoulder problems are the result of impingement of the subacromial structures, such as the bursa or rotator cuff tendons. Myofascial trigger points (MTrPs) in shoulder muscles may also lead to a complex of symptoms that are often seen in patients diagnosed with subacromial impingement or rotator cuff tendinopathy. Little is known about the treatment of MTrPs in patients with shoulder disorders.  相似文献   
3.
4.
5.
6.
mRNA for the suppressive epitope of p15E was found to be present in 24 of 30 samples of human colorectal cancer and in all four specimens of gastric cancer. mRNA for p15E was seldom seen in nonmalignant colonic or gastric mucosa but, when present, was associated with inflammatory or pre-malignant conditions of the digestive tract. Synthetic peptides derived from the conserved p15E sequence were found to suppress some aspects of the immune response implicated in anti-tumour activity. These data suggest that a p15E-related material with immunomodulatory properties is elaborated within human tumours, either by the tumour itself or as a normal component of the endogenous anti-tumour reaction.  相似文献   
7.
8.
Malignancy is a major risk factor for venous thromboembolic events, but not all patients with malignancy develop such events. This study attempts to identify risk factors in patients with malignancy who develop venous thromboembolic events. In the current study, 566 consecutive patients without venous thromboembolic events and 416 patients with, admitted to University of Michigan with malignancy between 1992 and 2000, were identified using International Classification of Diseases-9 Clinical Modification codes. Data on potential risk factors was obtained from the University of Michigan Cancer Registry and the medical record. Univariate and multivariate analysis was used to identify factors associated with venous thromboembolic events and mortality. The mean patient age was 45.6 years with a mean survival of 7.8 years from cancer diagnosis. Venous thromboembolic events were associated with solid tumors (odds ratio 5.0; 95% confidence interval 1.7-14.9; P = 0.004), infection (4.9; 1.2-19.8; P = 0.03), and increasing age (1.05; 1.03-1.08; P < 0.001). While leukopenia (4.2; 1.2-14.6; P = 0.02) was associated with an increased incidence of venous thromboembolic events, neutropenia was not. Sex, type of therapy, and cancer stage were not independently associated with venous thromboembolic events. Survival was decreased in patients with venous thromboembolic events (5.9 versus 9.2 years, P < 0.0001). Solid tumors (3.9; 1.8-8.4; P = 0.001), infection (3.3; 1.1-9.9; P = 0.03), advanced stage (1.6; 1.2-2.1; P = 0.001), and increasing age (1.02; 1.0-1.04; P = 0.01) were associated with decreased survival. Patients with malignancy who have solid tumors, advanced age, infection, and leukopenia have a significantly increased risk of venous thromboembolic events.  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