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   37664篇
  免费   3792篇
  国内免费   32篇
耳鼻咽喉   227篇
儿科学   1201篇
妇产科学   1038篇
基础医学   5216篇
口腔科学   718篇
临床医学   4636篇
内科学   6800篇
皮肤病学   594篇
神经病学   3339篇
特种医学   1463篇
外国民族医学   3篇
外科学   4687篇
综合类   781篇
一般理论   48篇
预防医学   4681篇
眼科学   920篇
药学   2805篇
中国医学   47篇
肿瘤学   2284篇
  2022年   298篇
  2021年   720篇
  2020年   397篇
  2019年   654篇
  2018年   702篇
  2017年   539篇
  2016年   583篇
  2015年   607篇
  2014年   873篇
  2013年   1320篇
  2012年   1896篇
  2011年   1868篇
  2010年   1078篇
  2009年   955篇
  2008年   1686篇
  2007年   1749篇
  2006年   1737篇
  2005年   1670篇
  2004年   1622篇
  2003年   1522篇
  2002年   1432篇
  2001年   1208篇
  2000年   1214篇
  1999年   1043篇
  1998年   446篇
  1997年   402篇
  1996年   371篇
  1995年   311篇
  1994年   337篇
  1993年   327篇
  1992年   820篇
  1991年   792篇
  1990年   776篇
  1989年   676篇
  1988年   692篇
  1987年   651篇
  1986年   605篇
  1985年   663篇
  1984年   541篇
  1983年   420篇
  1982年   268篇
  1981年   283篇
  1980年   257篇
  1979年   463篇
  1978年   344篇
  1977年   258篇
  1976年   270篇
  1974年   285篇
  1973年   261篇
  1972年   268篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
51.
How much pension will you receive from the NHS Superannulation Scheme upon retirement? Some hospital doctors do not have a clear idea of the likely benefits or indeed any appreciation of the ancillary features included in the NHSSS. It is therefore appropriate to begin this series of articles on pension options for doctors with an overview of the NHS Scheme.  相似文献   
52.
An experimental enzyme immunoassay (EIA) for detecting serum IgG antibody to Haemophilus ducreyi was developed using an ultrasonicated whole-cell antigen. The mean optical densities (OD) for sera from men with proven chancroid from Nairobi (47 patients) and Bangkok (72 patients) were significantly higher than those obtained from Nairobi men with genital ulcers not due to H. ducreyi, from Nairobi men with urethritis, from pregnant women in Nairobi, and from European men with sexually transmitted disease. When an OD of 0.500 was taken as the cutoff value, 89% and 55% of men with proven chancroid in Nairobi and Bangkok, respectively, were positive for H. ducreyi antibody, as compared with 2%-17% in the control groups. A rise in OD was observed in five of 18 patients with clinical chancroid. These results confirm the development of circulating antibodies in chancroid and suggest that this EIA may be useful for the diagnosis and epidemiological study of H. ducreyi infection.  相似文献   
53.
54.
This paper describes the introduction of a district nursing job-share in a primary health care team. Exploring change theory and different strategies for organizational change, the implications for members of the team are considered. In addition, changes in the balance of power which resulted in conflict within the district nursing team are discussed.  相似文献   
55.
Book reviews     
  相似文献   
56.
OBJECTIVES: to evaluate the Saville and Holdsworth Occupational Personality Questionnaire (OPQ) to assess its potential and validity as a tool in the recruitment of doctors. To determine the range of personality characteristics in a group of general practitioners. DESIGN: an administered commercially available questionnaire. SETTING: general practitioners in North and Mid. Stafftordshire. SUBJECTS: 133 general practitioners or trainees. RESULTS: 44% of general practitioners agreed to participate. The majority found it useful and recognised its potential to increase self-awareness, highlight weaknesses that might be improved and for future recruitment of others to their teams. Doctors' personality traits were similar to those of managerial/professional norms. The validity of the OPQ was supported by (a) significant associations with subjects' previously reported mental health problems and (b) 83% of respondents confirming that their reports correctly described their personalities at work. CONCLUSIONS: OPQs have a place in the recruitment of doctors by identifying appropriate people to strengthen the team.  相似文献   
57.
Glucose tolerance is determined by the balance of insulin secretion and insulin action and deteriorates with age. Insulin secretion does not appear to be reduced with increasing age, but many recent studies have demonstrated insulin resistance in healthy elderly subjects. However, this has not been a universal finding and the reasons for the discrepant results probably include general health, physical training, changes of liver size and delays in carbohydrate absorption. When confounding factors, particularly physical activity, are taken into account there appears to be little or no change in insulin action with age. Delays in monosacharride absorption may play a role. Maintaining physical fitness throughout middle and older age and so reducing hyperinsulinaemia may have benefits on reducing vascular disease.  相似文献   
58.
59.
60.
A retrospective analysis of the results of the first attempt at in vitro fertilization (IVF) treatment in 447 couples was performed by chart review. In 124 couples the female partners smoked cigarettes, and in 236 couples they did not. A total of 69 pregnancies (19.2%) were achieved, 50 in nonsmokers (21.2% per cycle), and 19 in smokers (15.3% per cycle). There were no significant differences in these cycles between the two groups in peak estradiol level achieved, the number of eggs retrieved, fertilization rate, or implantation rate. The incidence of spontaneous abortion was higher in smokers (42.1%) than in nonsmokers (18.9%). Consequently, the delivery rate per cycle of IVF was significantly lower in the smoking group (11 of 124, 9.6%) than in the nonsmokers (40 of 236, 17.0%). There was no effect when only the husband was a smoker. From these data, smoking appears to significantly reduce the chances of successful pregnancy after IVF treatment.  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