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   1278039篇
  免费   92855篇
  国内免费   1990篇
耳鼻咽喉   18200篇
儿科学   42307篇
妇产科学   37831篇
基础医学   187168篇
口腔科学   35391篇
临床医学   108255篇
内科学   251660篇
皮肤病学   26522篇
神经病学   99380篇
特种医学   50037篇
外国民族医学   366篇
外科学   197856篇
综合类   26533篇
现状与发展   1篇
一般理论   302篇
预防医学   92721篇
眼科学   29168篇
药学   97852篇
  1篇
中国医学   2499篇
肿瘤学   68834篇
  2018年   11848篇
  2015年   11641篇
  2014年   16047篇
  2013年   24395篇
  2012年   33629篇
  2011年   36033篇
  2010年   21251篇
  2009年   20061篇
  2008年   35042篇
  2007年   38015篇
  2006年   38597篇
  2005年   37867篇
  2004年   36448篇
  2003年   35428篇
  2002年   34978篇
  2001年   58149篇
  2000年   59635篇
  1999年   50728篇
  1998年   14247篇
  1997年   12820篇
  1996年   13078篇
  1995年   12354篇
  1994年   11767篇
  1993年   10864篇
  1992年   41009篇
  1991年   40385篇
  1990年   39911篇
  1989年   38731篇
  1988年   36128篇
  1987年   35367篇
  1986年   33739篇
  1985年   32150篇
  1984年   23935篇
  1983年   20827篇
  1982年   12388篇
  1981年   10930篇
  1980年   10214篇
  1979年   22654篇
  1978年   15884篇
  1977年   13731篇
  1976年   12978篇
  1975年   14209篇
  1974年   16694篇
  1973年   16089篇
  1972年   15327篇
  1971年   14234篇
  1970年   13221篇
  1969年   12733篇
  1968年   11982篇
  1967年   10484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