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   94804篇
  免费   9404篇
  国内免费   580篇
耳鼻咽喉   268篇
儿科学   2229篇
妇产科学   1709篇
基础医学   5561篇
口腔科学   4424篇
临床医学   19195篇
内科学   8145篇
皮肤病学   633篇
神经病学   5062篇
特种医学   942篇
外科学   3716篇
综合类   8786篇
现状与发展   3篇
一般理论   90篇
预防医学   36564篇
眼科学   346篇
药学   3887篇
  136篇
中国医学   1078篇
肿瘤学   2014篇
  2024年   368篇
  2023年   2946篇
  2022年   3739篇
  2021年   5232篇
  2020年   5375篇
  2019年   5213篇
  2018年   4507篇
  2017年   4206篇
  2016年   4051篇
  2015年   3954篇
  2014年   6311篇
  2013年   8173篇
  2012年   5507篇
  2011年   5921篇
  2010年   4511篇
  2009年   4528篇
  2008年   4374篇
  2007年   4393篇
  2006年   3769篇
  2005年   2921篇
  2004年   2497篇
  2003年   2144篇
  2002年   1578篇
  2001年   1522篇
  2000年   1307篇
  1999年   924篇
  1998年   771篇
  1997年   625篇
  1996年   525篇
  1995年   387篇
  1994年   336篇
  1993年   327篇
  1992年   266篇
  1991年   228篇
  1990年   179篇
  1989年   144篇
  1988年   174篇
  1987年   116篇
  1986年   101篇
  1985年   129篇
  1984年   84篇
  1983年   53篇
  1982年   58篇
  1981年   46篇
  1980年   63篇
  1979年   32篇
  1978年   36篇
  1977年   37篇
  1976年   33篇
  1975年   34篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
目的:分析广州地区1997年27例孕产妇死亡原因。方法:对广州地区1997年孕产妇死亡资料进行回顾性分析并与1981~1987年资料进行对比。结果:产后出血是直接产科致死原因的首位原因。结论:加强围产保健是降低孕产妇死亡的重要手段。  相似文献   
992.
新疆生产建设兵团卫生服务需要分析   总被引:2,自引:1,他引:1  
秦江梅  汪艾翔 《农垦医学》1999,21(5):308-312
目的 为了解现阶段兵团居民的健康水平、卫生服务需要量、医疗保健费用、卫生资及其利用效率,为合理地配置和规划卫生资料提供科学依据。方法 采取多阶段分层、整群抽样的方法,于1998年7月21日~8月10日在新疆生产建设兵团抽取5个师,13559人进行家庭入户健康访问调查。结果 兵团居民的两周患病率为109.9‰,其中市区居民的两周患病率为118.0‰、农场的两周患病主为106.4‰,城乡两周患病率比较  相似文献   
993.
山东省保健保偿覆盖率及其影响因素分析   总被引:1,自引:0,他引:1  
对山东省86 个县区的保健保偿情况进行了分析,目的在于摸清山东省保健保偿的覆盖率,分析影响保健保偿覆盖率的因素。结果显示,目前保健保偿覆盖率以县为单位占384% 。覆盖率的高低与经济水平有关(χ2= 7743, P < 005),经济水平高,覆盖率也相对较高。政府领导对保健保偿制的认识水平及与计划生育部门配合的是否好对保健保偿覆盖率的高低有显著影响。建议提高认识,大力推行妇幼保健保偿制;政府应加强对保健保偿制的政策支持,搞好各部门之间的协调,共同为妇女儿童健康服务。  相似文献   
994.
试析大型综合医院在社区医疗服务中的作用   总被引:7,自引:1,他引:6  
根据国家城市卫生服务体系改革的原则及对基层医院和大医院的功能定位,分析大型综合医院在社区医疗服务中的作用。指出大型综合医院应加强与城市基层医院的联系,建立全科医生培训基地,为社区医疗服务输送适用人才,建立切实可行的转诊制度,成为社区医疗服务的坚强后盾,提高社区医疗服务的质量和水平,促进社区医疗服务的发展。  相似文献   
995.
天津市某工业区大气污染对儿童健康影响的研究   总被引:12,自引:3,他引:9  
为探讨天津市区大气污染对儿童健康的影响,于1995年10-11月对天津市某工业区对对照区进行了充行病学调查。调查对象为7-12岁儿童,结果表明污泥区大气SO2、NOx,TSP、CO浓度均显著高于对照区;  相似文献   
996.
997.
998.
Uterine cervical cancer is the most common malignancy among females in developing countries, including India. The success of cervical cancer screening programs in North America and Western Europe has been the result of centralized cervical-cytology screening. This is not possible in the villages (n=17,000) of Tamilnadu where 58 percent of females in rural areas are illiterate, health infrastructure is mediocre, and cervical cytology is unknow. The present study was undertaken to examine if the village health nurse (VHN) could be trained quickly to identify a cervical abnormality by visual inspection so that we could down stage the cancer to earlier stages, more amenable to treatment. VHNs also would be trained to take an adequate Pap smear. A total of 101 VHNs were trained in batches and returned to their villages. Within two years, 6,459 engible women in the study area were screened. The agreement between the gynecologists and the VHNs in identifying cancer among those with abnormal cervix was 95 percent, and 80 percent of the Pap smears taken by VHNs were adequate by WHO criteria, making the feasibility study highly successful.Authors are with The Cancer Institute (WIA), Adyar, Madras, Tamil Nadu,India. Address correspondence to Dr Gajalakshmi, Epidemiology Division and Cancer Registry, 18, Sardar Patel Road, Cancer Institute (WIA), Madras-600 036, Tamilnadu, India. This project was funded by the Indian Council of Medical Research, Government of India, New Delhi, India.520 Cancer Causes and Control. Vol 7. 1996  相似文献   
999.
Erection difficulties have a profound effect on a man's quality of life, however, the emotional consequences are often overlooked in quantitative research where most sex-related questionnaires focus on a man's functional ability. Consequently, we developed a cross-cultural instrument to measure quality of life specific to male erection difficulties (QOL-MED). The items in the QOL-MED originated from interviewing forty men with erection difficulties in Seattle and Boston. Twelve men in the USA and 29 men in England helped us refine the instrument. Testing the QOL-MED's psychometric properties involved two administrations over a two-week period in the USA (n=40) and the UK (n=29). For discriminant validity, we predicted quality of life would worsen with increased self-perceived severity of the condition. After controlling for years with erection difficulties in a linear regression model, we found a significant negative association between self-perceived severity and quality of life for men in the UK only (p<0.01). The expectation that the measure would produce evidence for convergent validity by being more closely correlated to well-being than functional status was not confirmed. Both the USA and UK instruments were internally consistent (Cronbach's =0.94 and 0.96, respectively), and reproducible (0.78 and 0.95, respectively). This instrument provides a promising tool for studying therapies and understanding quality of life in patients with erectile dysfunction.This research was supported from a research grant from Syntex, Inc.Mr. Wagner is now a doctoral student at the University of California at Berkeley, Berkeley, CA, USA.  相似文献   
1000.
Summary
  • ? The objective of this study was to describe the variation in provision of health checks and health-promotion clinics operating under the regulations of the 1990 Contract for general practice in the UK.
  • ? Eighteen group practices in three Family Health Service Authority (FHSA) areas of England (two in the South West Thames region and one in the Yorkshire region) were selected for the study. The nurses, largely responsible for the implementation of the health checks at these practices, were interviewed using semi-structured interview schedules. They were asked about age-groups targeted, means of recruiting patients for clinics, duration of clinic appointments, and procedures carried out in clinics.
  • ? All practices offered health checks, and 55% had started doing so before introduction of the 1990 Contract. Recruitment for health checks took place in a number of ways: self-referral (83% of practices); opportunistically in those with coronary heart disease risk factors (78%); opportunistically during attendance for cervical smears (62%); screening in at least one patient group (78%). Blood pressure, height, weight, urinalysis and life-style advice were included by all practices. Stress management and quit smoking strategies were offered only by a minority of practices. Duration of first health-check appointment ranged between 15 and 30 minutes.
  • ? The basic content of health checks, and life-style advice given appeared consistent between the widely varying practices. However, the resources available for intervention and follow up showed more variation.
  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