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   1280781篇
  免费   93084篇
  国内免费   1999篇
耳鼻咽喉   18233篇
儿科学   42481篇
妇产科学   37876篇
基础医学   187543篇
口腔科学   35453篇
临床医学   108620篇
内科学   252288篇
皮肤病学   26549篇
神经病学   99639篇
特种医学   50121篇
外国民族医学   366篇
外科学   198131篇
综合类   26688篇
现状与发展   1篇
一般理论   304篇
预防医学   92983篇
眼科学   29114篇
药学   97997篇
  1篇
中国医学   2497篇
肿瘤学   68979篇
  2018年   11879篇
  2015年   11685篇
  2014年   16097篇
  2013年   24502篇
  2012年   33788篇
  2011年   36179篇
  2010年   21329篇
  2009年   20123篇
  2008年   35168篇
  2007年   38184篇
  2006年   38694篇
  2005年   37989篇
  2004年   36571篇
  2003年   35530篇
  2002年   35079篇
  2001年   58233篇
  2000年   59717篇
  1999年   50800篇
  1998年   14259篇
  1997年   12838篇
  1996年   13103篇
  1995年   12402篇
  1994年   11807篇
  1993年   10903篇
  1992年   41057篇
  1991年   40445篇
  1990年   39954篇
  1989年   38763篇
  1988年   36185篇
  1987年   35406篇
  1986年   33785篇
  1985年   32197篇
  1984年   23971篇
  1983年   20875篇
  1982年   12419篇
  1981年   10959篇
  1980年   10225篇
  1979年   22683篇
  1978年   15912篇
  1977年   13754篇
  1976年   12994篇
  1975年   14230篇
  1974年   16703篇
  1973年   16099篇
  1972年   15335篇
  1971年   14251篇
  1970年   13228篇
  1969年   12751篇
  1968年   12006篇
  1967年   10493篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
32.
33.
34.
35.
Neu-Laxova syndrome (NLS) is a rare autosomal recessive syndrome, characterized by severe intrauterine growth retardation (IUGR), microcephaly, abnormal brain development, oedema and ichthyosis. It was first reported in 1971 by Neu et al. (Pediatrics 47: 610-612) and since then no more than 60 cases have been reported. A newborn girl delivered from a 29-year-old healthy mother was admitted to hospital with a thick membrane covering her body and dismorphic appearance. The diagnosis of NLS was made according to characteristic features. The syndrome is known to have a poor prognosis and the baby lived for 9 weeks. This case is one of the longest living cases of NLS and the fourth case reported from Turkey.  相似文献   
36.
Leocani  L.  Comi  G. 《Neurological sciences》2006,27(1):s27-s29
Neurological Sciences - Brain plasticity, intended as the pattern of functional and structural changes in responses to environmental physiological or pathological events, is underlined by several...  相似文献   
37.
38.
39.
40.
CONTEXT: Although the nonmedical use of stimulant drugs such as cocaine and methamphetamine is increasingly common in many rural areas of the United States, little is known about the health beliefs of people who use these drugs. PURPOSE: This research describes illicit stimulant drug users' views on health and health-related concepts that may affect their utilization of health care services. METHODS: A respondent-driven sampling plan was used to recruit 249 not-in-treatment, nonmedical stimulant drug users who were residing in 3 rural counties in west central Ohio. A structured questionnaire administered by trained interviewers was used to collect information on a range of topics, including current drug use, self-reported health status, perceived need for substance abuse treatment, and beliefs about health and health services. FINDINGS: Participants reported using a wide variety of drugs nonmedically, some by injection. Alcohol and marijuana were the most commonly used drugs in the 30 days prior to the interview. Powder cocaine was used by 72.3% of the sample, crack by 68.3%, and methamphetamine by 29.7%. Fair or poor health status was reported by 41.3% of the participants. Only 20.9% of the sample felt they needed drug abuse treatment. Less than one third of the sample reported that they would feel comfortable talking to a physician about their drug use, and 65.1% said they preferred taking care of their problems without getting professional help. CONCLUSIONS: Stimulant drug users in rural Ohio are involved with a range of substances and hold health beliefs that may impede health services utilization.  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