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   1277000篇
  免费   92771篇
  国内免费   1989篇
耳鼻咽喉   18190篇
儿科学   42274篇
妇产科学   37822篇
基础医学   187017篇
口腔科学   35402篇
临床医学   108186篇
内科学   251526篇
皮肤病学   26499篇
神经病学   99201篇
特种医学   50017篇
外国民族医学   366篇
外科学   197649篇
综合类   26530篇
现状与发展   1篇
一般理论   300篇
预防医学   92618篇
眼科学   29057篇
药学   97776篇
  1篇
中国医学   2496篇
肿瘤学   68832篇
  2018年   11814篇
  2015年   11617篇
  2014年   16008篇
  2013年   24368篇
  2012年   33581篇
  2011年   35963篇
  2010年   21222篇
  2009年   20019篇
  2008年   35008篇
  2007年   37976篇
  2006年   38509篇
  2005年   37801篇
  2004年   36391篇
  2003年   35393篇
  2002年   34928篇
  2001年   58099篇
  2000年   59593篇
  1999年   50691篇
  1998年   14234篇
  1997年   12809篇
  1996年   13071篇
  1995年   12348篇
  1994年   11758篇
  1993年   10860篇
  1992年   40987篇
  1991年   40359篇
  1990年   39890篇
  1989年   38709篇
  1988年   36116篇
  1987年   35354篇
  1986年   33727篇
  1985年   32141篇
  1984年   23932篇
  1983年   20820篇
  1982年   12380篇
  1981年   10929篇
  1980年   10207篇
  1979年   22643篇
  1978年   15882篇
  1977年   13731篇
  1976年   12981篇
  1975年   14217篇
  1974年   16701篇
  1973年   16091篇
  1972年   15321篇
  1971年   14229篇
  1970年   13215篇
  1969年   12732篇
  1968年   11980篇
  1967年   10478篇
排序方式: 共有10000条查询结果,搜索用时 15 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