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   1207篇
  免费   179篇
耳鼻咽喉   7篇
儿科学   57篇
妇产科学   33篇
基础医学   108篇
口腔科学   67篇
临床医学   116篇
内科学   396篇
皮肤病学   29篇
神经病学   62篇
特种医学   44篇
外科学   149篇
综合类   39篇
预防医学   151篇
眼科学   6篇
药学   70篇
肿瘤学   52篇
  2020年   7篇
  2019年   8篇
  2018年   12篇
  2017年   12篇
  2016年   13篇
  2015年   12篇
  2014年   14篇
  2013年   36篇
  2012年   57篇
  2011年   50篇
  2010年   28篇
  2009年   47篇
  2008年   49篇
  2007年   58篇
  2006年   36篇
  2005年   57篇
  2004年   51篇
  2003年   52篇
  2002年   54篇
  2001年   51篇
  2000年   49篇
  1999年   45篇
  1998年   15篇
  1997年   25篇
  1996年   27篇
  1995年   17篇
  1994年   20篇
  1993年   14篇
  1992年   24篇
  1991年   30篇
  1990年   26篇
  1989年   25篇
  1988年   29篇
  1987年   32篇
  1986年   37篇
  1985年   35篇
  1984年   22篇
  1983年   11篇
  1982年   11篇
  1981年   15篇
  1980年   12篇
  1979年   18篇
  1978年   10篇
  1977年   17篇
  1976年   10篇
  1975年   8篇
  1974年   14篇
  1971年   9篇
  1970年   9篇
  1966年   5篇
排序方式: 共有1386条查询结果,搜索用时 62 毫秒
91.
92.
OBJECTIVE: Name-based classification systems are potentially useful in identifying study samples based on probable ethnic minority group. The aim of the current study was to assess the validity of the Nam Pehchan name classification programme of religion and language against subject self-report. STUDY DESIGN AND SETTING: A population-based cross-sectional survey conducted in areas of the North-West and West Midland regions of England with a relatively high density of South Asian ethnic minority groups. The sampling frame was age-sex registers of selected general practices and subjects were classified according to language and religion using the Nam Pehchan programme. These were compared with responses by subjects on a self-complete postal questionnaire. RESULTS: One thousand nine hundred and forty-nine subjects who participated, classified themselves as South Asian. Sensitivity in identifying religion was high amongst Muslims (92%) and Sikhs (86%), and somewhat lower in Hindus (62%). Specificity exceeded 95% for all ethnic groups. The vast majority of subjects assigned Punjabi or Gujarati as their main South Asian language indicated that they did in fact speak these languages (97% and 94%, respectively). Subjects assigned Urdu or Bengali, however, were less likely to do so (61% and 35%, respectively). CONCLUSIONS: The name-based classification system Nam Pehchan has demonstrated high levels of accuracy in some sub-groups of the South Asian population in determining subjects likely language spoken and religion-and is likely to be a useful additional tool when information on ethnicity is not already available.  相似文献   
93.
94.
95.
During 1986 and 1987 parents in part of the Oxfordshire district health authority were given their child's health and development records while in the other part of the health district the records remained with the clinic. Between August 1988 and February 1989 an audit was made of a sample of parents attending child health clinics in the two areas: the study examined 284 parents who had parent held records and 168 who did not; how many records were available and if not, why not; how well and by whom records were completed and parents' views on who they felt should keep the record. Interviews revealed that parents with a parent held record liked the scheme and were confident about remembering to take the record to the clinic. Those without experience were less confident and more concerned about losing the record. At the time of the audit 7% of parent held records had been lost or forgotten, but 5% of clinic held records were not available for inspection. Overall, parent held records were more likely to have comments contributed by parents and to be more thoroughly completed by professionals. The results suggest that parent held records are not only workable but desirable.  相似文献   
96.
97.
98.
99.
The standard format in which NHS regions are invited to submit data from their perinatal mortality surveys for comparative analysis in the British Journal of Obstetrics and Gynaecology is described. Some examples of the way these data can and will be used to compare regional differences in mortality patterns are given and possible future developments are discussed. Although the term perinatal mortality is used in the title, it is hoped that surveys will cover stillbirths and neonatal deaths and also, where possible, late fetal deaths of less than 28 weeks gestation.  相似文献   
100.
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