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   1415447篇
  免费   102025篇
  国内免费   2571篇
耳鼻咽喉   19795篇
儿科学   45636篇
妇产科学   40050篇
基础医学   205244篇
口腔科学   38427篇
临床医学   122015篇
内科学   280299篇
皮肤病学   29482篇
神经病学   111980篇
特种医学   56045篇
外国民族医学   377篇
外科学   219690篇
综合类   28207篇
现状与发展   1篇
一般理论   405篇
预防医学   103045篇
眼科学   32029篇
药学   106664篇
  1篇
中国医学   2702篇
肿瘤学   77949篇
  2018年   15001篇
  2017年   11404篇
  2016年   12844篇
  2015年   14759篇
  2014年   20486篇
  2013年   30485篇
  2012年   42659篇
  2011年   45673篇
  2010年   26824篇
  2009年   25385篇
  2008年   43598篇
  2007年   46947篇
  2006年   47378篇
  2005年   46816篇
  2004年   44616篇
  2003年   42947篇
  2002年   42197篇
  2001年   59796篇
  2000年   61038篇
  1999年   52447篇
  1998年   15928篇
  1997年   14160篇
  1996年   14232篇
  1995年   13421篇
  1994年   12733篇
  1993年   11752篇
  1992年   42024篇
  1991年   41306篇
  1990年   40699篇
  1989年   39475篇
  1988年   36811篇
  1987年   36044篇
  1986年   34419篇
  1985年   32818篇
  1984年   24669篇
  1983年   21485篇
  1982年   13190篇
  1981年   11646篇
  1979年   23171篇
  1978年   16430篇
  1977年   14180篇
  1976年   13399篇
  1975年   14548篇
  1974年   17088篇
  1973年   16436篇
  1972年   15649篇
  1971年   14481篇
  1970年   13462篇
  1969年   12916篇
  1968年   12168篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
52.
53.
54.
At the time of hire, 4059 of 6522 healthcare workers required a 2-step tuberculin skin test; 114 workers (2.8%) demonstrated a boosted reaction after the second step. Boosted reactions were significantly associated with male sex and older age. A verbal history of previous tuberculin skin test results was not a reliable indicator of baseline tuberculin skin test status at the time of hire.  相似文献   
55.
French asthma patients may be supervised by general practitioners (GPs) and/or specialists. Therefore, this study examined asthma management in patients exclusively supervised by specialists (SPE), GPs, (GP) and both (GP+SPE group), and compared the findings. Asthma patients were consecutively recruited in 348 pharmacies. Each patient completed a questionnaire providing data on personal characteristics, asthma management, perception of disease and asthma supervision. Asthma control was measured using the Asthma Control Test. Questionnaires were linked to computerised records of medications which had been dispensed before inclusion in the study. From the 1,256 patients (mean age = 36.1 yrs, 54.3% females), 11.4, 36.6, and 52.0% were placed in the SPE, GP, and GP+SPE groups, respectively. During the previous 4 weeks, most patients in the SPE group were properly controlled (52.2 versus 26.4 and 21.5% in GP and GP+SPE groups, respectively). The SPE group made more use of fixed combinations of long-acting beta agonist and inhaled corticosteroid, while receiving less short-acting beta agonists, antitussives and antibiotics. Striking differences in symptoms and asthma management were observed according to the type of asthma supervision. The current results strongly support the need to improve the management of asthma in primary care, and the coordination of care between general practitioners and specialists.  相似文献   
56.
57.
58.
This article describes the proceedings of the 2006 Annual Meeting of the Fetal Alcohol Spectrum Disorders Study Group (FASDSG), which was held in Baltimore, Maryland on June 24, 2006. The meeting was held in conjunction with the annual meeting of the Research Society on Alcoholism and was supported by a grant from the National Institute on Alcohol Abuse and Alcoholism. The 2005-2006 FASDSG officers, Daniel J. Bonthius (President), Heather Carmichael Olson (Vice-President), and Jennifer Thomas (Secretary-Treasurer), organized the meeting. Nationally prominent speakers delivered plenary lectures on topics of newborn screening, ethics, and neuroscience. Selected members of the FASDSG provided brief scientific data (FASt) reports, describing new research findings. Representatives from national agencies involved in fetal alcohol syndrome (FAS) research, treatment, and prevention provided updates regarding priorities, funding, and agency activities. Presentations were also made by the 2006 Student Merit Award recipient and by the 2006 Rosett Award recipient. The meeting served as a forum for clinicians, neuroscientists, psychologists, social scientists, and other professionals to discuss recent advances in FAS research and to identify the most important gaps in the understanding of alcohol-induced teratology.  相似文献   
59.
60.
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