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   718246篇
  免费   49543篇
  国内免费   1322篇
耳鼻咽喉   9273篇
儿科学   23635篇
妇产科学   17833篇
基础医学   112950篇
口腔科学   20089篇
临床医学   64951篇
内科学   136909篇
皮肤病学   16505篇
神经病学   50432篇
特种医学   26242篇
外国民族医学   76篇
外科学   106053篇
综合类   14849篇
现状与发展   2篇
一般理论   160篇
预防医学   52010篇
眼科学   16470篇
药学   54796篇
  3篇
中国医学   2386篇
肿瘤学   43487篇
  2019年   5609篇
  2018年   8196篇
  2017年   6320篇
  2016年   7076篇
  2015年   7842篇
  2014年   10585篇
  2013年   15818篇
  2012年   21367篇
  2011年   22332篇
  2010年   13116篇
  2009年   12237篇
  2008年   20741篇
  2007年   22302篇
  2006年   22643篇
  2005年   21180篇
  2004年   20683篇
  2003年   19580篇
  2002年   19050篇
  2001年   36528篇
  2000年   37062篇
  1999年   30534篇
  1998年   7913篇
  1997年   6699篇
  1996年   7000篇
  1995年   6661篇
  1994年   6124篇
  1993年   5609篇
  1992年   23035篇
  1991年   23002篇
  1990年   22395篇
  1989年   22174篇
  1988年   20116篇
  1987年   19490篇
  1986年   18538篇
  1985年   17363篇
  1984年   12752篇
  1983年   10775篇
  1982年   5950篇
  1979年   11583篇
  1978年   8175篇
  1977年   6869篇
  1976年   6617篇
  1975年   7301篇
  1974年   8549篇
  1973年   8189篇
  1972年   7692篇
  1971年   7157篇
  1970年   6911篇
  1969年   6331篇
  1968年   5797篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
52.
Background.Computers that collect data from patients and provide both patients and practitioners with printed feedback on a range of health risks are a tool for assisting general practitioners with preventive care. This study assessed the impact of computer-generated printed feedback on cervical screening among women who were underscreened for cervical cancer.Method.Female attenders at two Australian general practices were randomly allocated to Experimental or Control groups. Women in both groups completed a health risk survey on a touch screen computer prior to their consultation. Those in the Experimental group received printed pages summarizing their results, including their eligibility for cervical screening and last Pap test, for themselves and their doctor. The number and proportion of underscreened women who had a Pap test in the 6 months after completing the computer survey, as determined by pathology records, were examined.Results.Of the 679 participants, 139 were classified as underscreened on the basis of self-report (74 Experimental, 65 Control) and 272 on the basis of their pathology records (148 Experimental, 124 Control). Overall about one-third of women had a test in the 6-month period, and the differences between the groups were not significant for women overall (18–70 years) or for women 18–49 years. Among women 50–70 who were underscreened based on self-report, those receiving the printout were more likely to have a Pap test in the next 6 months (P< 0.05). This pattern was also evident, but did not reach statistical significance, for older women who were underscreened based on pathology records.Conclusions.We are unable to draw conclusions regarding the effectiveness of the computer system due to the modest proportions of women screened, the small numbers, and the fact that the computer survey may have created an intervention effect in the Control group. As the study suggests the computer system is acceptable to women and may be effective for encouraging screening among older women, further exploration of the system is desirable.  相似文献   
53.
In this paper, the authors describe some of the complexities of collecting and presenting data on race and ethnicity based on the experiences of the Bureau of the Census. Different methods of data collection, different content and format of questions, and different definitions make it difficult to collect consistent race and ethnic data across data systems. The Bureau of the Census experiences have shown that changing ethnic self-identity and concepts, intent of the question, consistency of reporting, and the classification of persons of mixed racial parentage affect the quality of the data. These are some of the issues that must be addressed as statistical agencies and researchers seek to provide comparable race and ethnic data.  相似文献   
54.
55.
56.
57.
Acute renal failure (ARF) developed in a 7-week-old infant due to bilateral candidal bezoars (fungal balls) causing obstruction at the pelviureteric junction. The baby was born at term with an appropriate birthweight, and had been treated with broad-spectrum antibiotics for respiratory distress and septicemia during the 1st week of life. Recovery from ARF followed renal decompression with bilateral nephrostomy tube placement and parenteral administration of amphotericin B and 5-flucytosine. Received August 21, 1996; received in revised form and accepted January 3, 1997  相似文献   
58.
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