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   1335771篇
  免费   94319篇
  国内免费   2908篇
耳鼻咽喉   19714篇
儿科学   40227篇
妇产科学   38659篇
基础医学   187200篇
口腔科学   39817篇
临床医学   112614篇
内科学   262361篇
皮肤病学   30205篇
神经病学   106358篇
特种医学   53665篇
外国民族医学   435篇
外科学   208206篇
综合类   31044篇
现状与发展   6篇
一般理论   437篇
预防医学   92033篇
眼科学   31357篇
药学   100054篇
  4篇
中国医学   2988篇
肿瘤学   75614篇
  2018年   11737篇
  2015年   11872篇
  2014年   16683篇
  2013年   25237篇
  2012年   32993篇
  2011年   34858篇
  2010年   20727篇
  2009年   20224篇
  2008年   33571篇
  2007年   36674篇
  2006年   37248篇
  2005年   36003篇
  2004年   35080篇
  2003年   34057篇
  2002年   33584篇
  2001年   63614篇
  2000年   65322篇
  1999年   55386篇
  1998年   14650篇
  1997年   13458篇
  1996年   12937篇
  1995年   12221篇
  1994年   11467篇
  1992年   42761篇
  1991年   41280篇
  1990年   40553篇
  1989年   39550篇
  1988年   36963篇
  1987年   36408篇
  1986年   34899篇
  1985年   33101篇
  1984年   24822篇
  1983年   21052篇
  1982年   12664篇
  1981年   11568篇
  1980年   10773篇
  1979年   23923篇
  1978年   17068篇
  1977年   14834篇
  1976年   13386篇
  1975年   15268篇
  1974年   18080篇
  1973年   17560篇
  1972年   16811篇
  1971年   15718篇
  1970年   14914篇
  1969年   14346篇
  1968年   13460篇
  1967年   12015篇
  1966年   11258篇
排序方式: 共有10000条查询结果,搜索用时 23 毫秒
961.
962.
963.
964.
965.
966.
Training needs analysis is considered essential to professional and organizational development, for continuing education and for incorporation into professional practice. Increasingly, nurses are encouraged to develop their health promotion role. Despite this there has been relatively little research in Scotland into the health promotion role of the hospital nurse. This study describes the results of a health promotion training needs analysis undertaken on qualified, hospital-based nurses in Lanarkshire, Scotland. Information on the nurses' current health promotion practices, their attitudes and beliefs, their views on role development and priorities for further training were collated, analysed and discussed within the framework of the Health Action Model. This model was originally designed to assist understanding of the gap that exists between an individual intention to act and the eventual health action. However, in this study the ways in which ‘cognitive factors’ (knowledge and beliefs) and ‘motivational factors’ (considering values, attitudes and drives) and pressures from social norms and significant others assisted in the understanding of the nurse's orientation to, and beliefs about, health promotion practice. Fifty-seven per cent of nurses in the study considered health promotion activities to be emerging in clinical care and 4% considered them to be advanced. The interest respondents have in role development and the further integration of health promotion activities into nursing practice was explored by ascertaining the nurses' attitudes and beliefs about their own health promotion role. Of 107 respondents, a majority 72 (67%) agreed health promotion interventions to be an important function of the nurse with 29 (27%) strongly agreeing (n=107). Sixty per cent stated they would be interested in developing their role and 30% were very strongly interested. Recommendations are therefore made for future planning and development strategies for the health promotion role of hospital nurses.  相似文献   
967.
968.
Back pain in in-vitro fertilized and spontaneous pregnancies   总被引:1,自引:0,他引:1  
The influence of ovarian stimulation in in-vitro fertilization (IVF) on the prevalence of back pain with onset during pregnancy was studied in 31 women who became pregnant after IVF treatment and compared with that of 200 spontaneously pregnant women. A two times higher prevalence rate of sacral pain in late pregnancy was reported among IVF pregnant women (P < 0.0001), as well as a significantly higher prevalence rate of positive results of pelvic pain provocation tests performed in late pregnancy (0.0001 < or = P < or = 0.015), as compared with that of the spontaneously pregnant women. Among the IVF pregnant women, there was a significant positive correlation between relaxin concentrations in early pregnancy and the outcome of pelvic pain provocation tests (0.44 < or = r < or = 0.51, P < 0.05). In addition, the serum relaxin concentration was the factor that best explained differences in sacral pain prevalence. When the influence of serum relaxin concentration on back pain prevalence was taken into account, women carrying multiple pregnancies had no more pain than women carrying singletons, and IVF pregnant women had no more pain than spontaneously pregnant women. These results support the hypothesis that relaxin is involved in the generation of pelvic pain in pregnant women.   相似文献   
969.
970.
Bilateral germ cell tumours of the testis are rare but a rise in their incidence is expected since with the new therapeutic possibilities a significant improvement in prognosis has been achieved even in patients with advanced metastatic spread. Of the 210 patients treated for malignent germ cell tumours at our Department, six (2.9%) developed a contralateral testicular tumour. All patients had metachronous tumours and the second tumours occurred after an interval ranging between 1 and 22 years. The epidemiology, histology, diagnosis, therapy and prognosis are discussed, and the significance of regular self-examination of the remaining testis in patients with testicular tumour is emphasized.  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