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   5583篇
  免费   486篇
  国内免费   23篇
耳鼻咽喉   106篇
儿科学   241篇
妇产科学   85篇
基础医学   737篇
口腔科学   77篇
临床医学   500篇
内科学   1191篇
皮肤病学   152篇
神经病学   297篇
特种医学   237篇
外科学   645篇
综合类   322篇
现状与发展   1篇
一般理论   4篇
预防医学   351篇
眼科学   85篇
药学   434篇
中国医学   30篇
肿瘤学   597篇
  2023年   50篇
  2022年   72篇
  2021年   126篇
  2020年   84篇
  2019年   103篇
  2018年   142篇
  2017年   99篇
  2016年   135篇
  2015年   133篇
  2014年   181篇
  2013年   217篇
  2012年   358篇
  2011年   342篇
  2010年   209篇
  2009年   182篇
  2008年   282篇
  2007年   313篇
  2006年   218篇
  2005年   197篇
  2004年   194篇
  2003年   180篇
  2002年   150篇
  2001年   161篇
  2000年   165篇
  1999年   162篇
  1998年   81篇
  1997年   57篇
  1996年   48篇
  1995年   51篇
  1994年   68篇
  1993年   47篇
  1992年   125篇
  1991年   84篇
  1990年   79篇
  1989年   110篇
  1988年   62篇
  1987年   72篇
  1986年   56篇
  1985年   63篇
  1984年   45篇
  1983年   33篇
  1982年   33篇
  1979年   28篇
  1977年   46篇
  1975年   28篇
  1974年   32篇
  1973年   41篇
  1972年   34篇
  1971年   29篇
  1967年   33篇
排序方式: 共有6092条查询结果,搜索用时 9 毫秒
11.
12.
13.

Background and Purpose:   

Management of rib fractures constitutes a major part of the trauma workload of any unit. Rib fractures result in disrupted chest wall mechanics and ventilatory insufficiency. The ability of a lung injury scoring system to predict the degree of respiratory dysfunction after rib fractures was evaluated.  相似文献   
14.
15.
16.
An epidemiological study on dystonia has not been reported from India. As part of a major study to find out the prevalence of major neurological disorders in the large urban city of Kolkata, Eastern India, we planned to determine the prevalence of primary dystonia. The study design was a cross-sectional study of a sample population obtained through stratified random selection and conducted in a two-stage procedure of screening by a nonprofessional team followed by confirmation of screened positive cases by the study neurologist. A total population of 52,377 was screened, and 29 subjects with dystonia were diagnosed. Out of them 23 subjects had primary dystonias [crude prevalence rate (CPR), 43.91/100,000; 95% confidence interval (CI), 28.41-64.81; age-standardized rates to world standard population, 49.06 (95% CI,31.74-72.41)] and all cases were focal type and predominantly of limb dystonia variety. Mean onset of dystonias were earlier in women (43.5 years) as compared to men (46.6 years). Thus our study on primary dystonia shows higher prevalence when compared with that of many studies globally, predominantly of focal type, earlier onset among women, and more cases of limb dystonias when compared with more prominent blepharospasm and cervical dystonias in western reports.  相似文献   
17.
OBJECTIVE: Depression after hip fracture surgery is prevalent and associated with increased mortality rates and impaired functional recovery. The incidence of new-onset depressive symptoms in patients initially not depressed after hip fracture surgery and their relationship with functional recovery is unknown. METHODS: A cohort of 139 nondepressed elderly patients (>60 years) hospitalized for hip fracture surgery were followed up for six months. Clinically significant depressive symptoms were defined as a score of 7 or more on the 15-item Geriatric Depression Scale. RESULTS: The authors found a cumulative incidence rate of 20.5% adjusted for dropouts. Multiple Cox-regression analyses yielded the presence of subthreshold symptoms of depression, anxiety, pain, and cognitive impairment at baseline, the premorbid level of mobility, and a history of (treated) depression as risk factors for incident depression (p <0.05). A forward, conditional procedure identified postoperative pain (hazard ratio [HR] = 1.32, 95% confidence interval [CI]: 1.14-1.53, Wald chi(2) = 13.57, df = 1, p <0.001) and baseline anxiety (HR = 1.25, 95% CI: 1.08-1.44, Wald chi(2) = 8.86, df = 1, p = 0.003) as the strongest independent risk factors. Incident depression was associated with a less favorable outcome at 3 months follow-up. CONCLUSION: This exploratory study identified two treatable baseline characteristics that predicted incident depression in nondepressed patients after hip-fracture surgery.  相似文献   
18.
19.
Pouchitis: Risk Factors, Etiology, and Treatment   总被引:4,自引:0,他引:4  
  相似文献   
20.
Current views on the pathophysiology of acute biliary pancreatitis.   总被引:12,自引:0,他引:12       下载免费PDF全文
A K Banerjee  R J Steele 《Gut》1995,36(6):803-805
  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