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   2499篇
  免费   175篇
  国内免费   6篇
耳鼻咽喉   99篇
儿科学   49篇
妇产科学   7篇
基础医学   442篇
口腔科学   81篇
临床医学   224篇
内科学   488篇
皮肤病学   53篇
神经病学   258篇
特种医学   186篇
外国民族医学   1篇
外科学   345篇
综合类   31篇
预防医学   162篇
眼科学   32篇
药学   116篇
中国医学   3篇
肿瘤学   103篇
  2023年   17篇
  2021年   42篇
  2020年   28篇
  2019年   36篇
  2018年   42篇
  2017年   37篇
  2016年   52篇
  2015年   50篇
  2014年   79篇
  2013年   107篇
  2012年   120篇
  2011年   139篇
  2010年   78篇
  2009年   65篇
  2008年   116篇
  2007年   116篇
  2006年   112篇
  2005年   94篇
  2004年   94篇
  2003年   89篇
  2002年   100篇
  2001年   76篇
  2000年   65篇
  1999年   55篇
  1998年   38篇
  1997年   38篇
  1996年   36篇
  1995年   30篇
  1994年   39篇
  1993年   23篇
  1992年   55篇
  1991年   42篇
  1990年   50篇
  1989年   46篇
  1988年   33篇
  1987年   18篇
  1986年   29篇
  1985年   27篇
  1984年   32篇
  1983年   16篇
  1982年   20篇
  1981年   16篇
  1979年   29篇
  1978年   20篇
  1977年   18篇
  1976年   25篇
  1975年   16篇
  1973年   19篇
  1972年   22篇
  1971年   20篇
排序方式: 共有2680条查询结果,搜索用时 15 毫秒
151.
152.
153.
154.
155.
156.
In patients older than 50 years, a first seizure can reveal non-ketotic hyperglycemia, regardless of any previous history of diabetes mellitus. Partial motor seizures are observed in most cases, sometimes with epilepsia partialis continua. Plasma glucose levels are usually above 20 mmol/L, and serum osmolarity is normal or slightly elevated. The absence of ketoacidosis may promote the occurrence of seizures. EEG and neuroimaging between seizures are usually normal. Treatment involves correction of the hyperglycemia with insulin treatment and rehydration.  相似文献   
157.
BACKGROUND: A retrospective analysis was performed to estimate the practicability of a pumpless extracorporeal lung assist system (pECLA) in trauma patients suffering from severe brain injury and the acute respiratory distress syndrome (ARDS). METHODS: Five patients with acute severe brain injury and ARDS, ventilated in a lung protective mode, were connected to pECLA to avoid the detrimental effects of hypercapnia on intracranial pressure (ICP) and cerebral outcome. With pECLA hypercapnia was eliminated in all patients while the minute volume of artificial ventilation could be reduced. Subsequently, ICP was reduced, systemic hemodynamics and cerebral perfusion pressure remained stable. One patient died due to multi-organ failure as a consequence of multi-trauma. The remaining patients survived showing a good neurologic function. CONCLUSIONS: pECLA is a promising alternative compared with conventional pump-driven systems for patients with ARDS and brain injury, since the pECLA system has minor restrictions, limitations and side effects.  相似文献   
158.
In recent years, no major advances have been made in understanding the mechanisms underlying the development of tinnitus. Hence, the present therapeutic strategies aim at decoupling the subconscious from the perception of tinnitus. Mindful of the lessons drawn from existing tinnitus retraining and desensitisation therapies, a new integrated day hospital strategy of treatment lasting 7-14 days has been developed at the Charité Hospital and is presented in the present paper. The strategy for treating tinnitus in the proximity of patient domicile is designed for patients who feel disturbed in their world of perception and their efficiency due to tinnitus and give evidence of mental and physical strain. In view of the etiologically non-uniform and multiple events connected with tinnitus, consideration was also given to the fact that somatic and psychosocial factors are equally involved. Therefore, therapy should aim at diagnosing and therapeutically influencing those psychosocial factors that reduce the hearing impression to such an extent that the affected persons suffer from strain. The first results of therapy-dependent changes of 46 patients suffering from chronic tinnitus are presented. The data were evaluated before and after 7 days of treatment and 6 months after the end of treatment. Immediately after the treatment, the scores of both the tinnitus questionnaire (Goebel and Hiller) and the subscales improved significantly. These results were maintained during the 6-month post-treatment period and even improved.  相似文献   
159.
160.
In 2004, the American Podiatric Medical Association conducted its third annual "Best Walking City Competition." This study improved on the 2002 and 2003 studies by increasing the number of cities competing for the title of "Best Walking City" and by including a variety of new measures of walking activities to provide a more comprehensive and equitable basis for comparing cities. The top 20 best walking cities in 2004 were identified from among the 200 largest cities across the United States. Lists of top cities were also developed by city population size and geographic region and by three different types of walking activities prevalent in each city.  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