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   173184篇
  免费   32218篇
  国内免费   2454篇
耳鼻咽喉   5465篇
儿科学   6694篇
妇产科学   2966篇
基础医学   5587篇
口腔科学   2018篇
临床医学   27851篇
内科学   51844篇
皮肤病学   8138篇
神经病学   16084篇
特种医学   7058篇
外科学   43752篇
综合类   984篇
现状与发展   72篇
一般理论   15篇
预防医学   8135篇
眼科学   4672篇
药学   3082篇
中国医学   185篇
肿瘤学   13254篇
  2024年   696篇
  2023年   4920篇
  2022年   1586篇
  2021年   3861篇
  2020年   6378篇
  2019年   2650篇
  2018年   8011篇
  2017年   7748篇
  2016年   8948篇
  2015年   8886篇
  2014年   16268篇
  2013年   16582篇
  2012年   6877篇
  2011年   7022篇
  2010年   11145篇
  2009年   14887篇
  2008年   6814篇
  2007年   5097篇
  2006年   7560篇
  2005年   4682篇
  2004年   3870篇
  2003年   2719篇
  2002年   2733篇
  2001年   4452篇
  2000年   3670篇
  1999年   3735篇
  1998年   3841篇
  1997年   3606篇
  1996年   3486篇
  1995年   3339篇
  1994年   2047篇
  1993年   1654篇
  1992年   1733篇
  1991年   1768篇
  1990年   1386篇
  1989年   1497篇
  1988年   1293篇
  1987年   1094篇
  1986年   1111篇
  1985年   941篇
  1984年   714篇
  1983年   652篇
  1982年   583篇
  1981年   489篇
  1980年   423篇
  1979年   461篇
  1978年   424篇
  1977年   477篇
  1975年   360篇
  1972年   419篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
53.
To assess the relationship between the DSM-III criteria for attention deficit disorder with hyperactivity (ADDH) and the DSM-III-R criteria for attention-deficit hyperactivity disorder (ADHD), children from an inner city parochial school were evaluated using a 30-item teacher questionnaire consisting of the DMS-III and DSM-III-R criteria for these disorders, the revised Conners Parent and Teacher Questionnaires, and a continuous performance test. Diagnostic groups were established based on teacher ratings of the DSM items and evaluated in relation to the rating scale data and continuous performance test. While children who were identified by teachers as having ADDH almost always satisfied the criteria for ADHD, a new group of children who were hyperactive and impulsive but less clearly inattentive also met the criteria for ADHD. Implications of the change in diagnostic criteria are discussed.  相似文献   
54.
55.
56.
SETTING: Homes in Delhi, India. OBJECTIVE: To study the reach of mass media campaigns and their impact on awareness about tuberculosis (TB) control among homemakers/housewives. DESIGN: A community-based cross-sectional survey among homemakers residing in Delhi for more than 6 months. RESULTS: Of a total of 920 women interviewed, about 74.2% had seen specific TB-related health messages in one or more of the mass media. The maximum number of subjects could recall having seen billboards or television campaigns. The percentage of respondents who had correct information about various aspects of the disease was higher among those who had seen TB campaigns on any of the mass media. The effectiveness of radio and newsprint in communicating TB messages was found to be more limited than that of television and billboards. CONCLUSION: The mass media can be effective in getting messages about TB across to the community of women who are homemakers, especially in developing countries. In view of our findings, it may be recommended that television and billboards be used as tools for reaching out to them with specific campaigns regarding TB control, and that the use of these media should be strengthened further.  相似文献   
57.
58.
59.
Four Chinese patients (2 boys, 2 girls), ages 4–9 years, who had episodes of perception error of body schema and objects are reported. The metamorphopsia, which had been named Alice in Wonderland syndrome, is the major presentation. All of them were proved to have acute Epstein-Barr virus infection, as documented by positive heterophil antibody test and/or positive IgM antibody to Epstein-Barr virus capsid antigen. The duration of the perception disorder ranged from 1 week to 3 months. We believe that any young child presenting with Alice in Wonderland syndrome should undergo examination for Epstein-Barr virus infection; complete recovery from the disorder can be expected.  相似文献   
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