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   41126篇
  免费   3056篇
  国内免费   759篇
耳鼻咽喉   131篇
儿科学   352篇
妇产科学   350篇
基础医学   1857篇
口腔科学   286篇
临床医学   4761篇
内科学   2449篇
皮肤病学   286篇
神经病学   534篇
特种医学   777篇
外科学   1666篇
综合类   11339篇
现状与发展   2篇
一般理论   38篇
预防医学   15312篇
眼科学   231篇
药学   1881篇
  290篇
中国医学   1929篇
肿瘤学   470篇
  2024年   130篇
  2023年   627篇
  2022年   1213篇
  2021年   1639篇
  2020年   1949篇
  2019年   1263篇
  2018年   1155篇
  2017年   1132篇
  2016年   1169篇
  2015年   1118篇
  2014年   3024篇
  2013年   3147篇
  2012年   2925篇
  2011年   3240篇
  2010年   2686篇
  2009年   2257篇
  2008年   2561篇
  2007年   2356篇
  2006年   2045篇
  2005年   1645篇
  2004年   1316篇
  2003年   1028篇
  2002年   768篇
  2001年   648篇
  2000年   549篇
  1999年   406篇
  1998年   350篇
  1997年   319篇
  1996年   279篇
  1995年   256篇
  1994年   174篇
  1993年   94篇
  1992年   93篇
  1991年   140篇
  1990年   121篇
  1989年   103篇
  1988年   105篇
  1987年   81篇
  1986年   106篇
  1985年   88篇
  1984年   90篇
  1983年   77篇
  1982年   82篇
  1981年   58篇
  1980年   66篇
  1979年   32篇
  1978年   55篇
  1977年   57篇
  1976年   57篇
  1975年   37篇
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
51.
A postal survey of 434 clinicians at four local hospitals was undertaken in order to identify the methods by which clinicians learn how to request permission for hospital autopsies and to assess the preferred techniques and timing of relevant communication skills training. The majority of 128 responding clinicians had learnt through personal experience with some assistance from senior colleagues and peers. Few clinicians appeared to have learnt through formal training. The preferred methods for the provision of communication skills training were training in small groups (such as seminars or tutorials) and observation of clinicians at work. The most desirable time for the provision of this training was considered to be between the beginning of the final undergraduate year and the end of the pre-registration house officer year. The communication skills training provided within medical education is in need of improvement. More emphasis should be given to clinical-task- or situation-specific applications such as requesting permission for autopsies.  相似文献   
52.
本实验就复方硅橡胶栓堵剂(CSR)对家兔输卵管上皮细胞趋微结构的影响进行了观察分析,并测定了上皮细胞内铜元素的含量变化,电镜观察表明:家充输卵管经复方硅橡胶栓堵后,其上皮细胞表面结构、细胞连接、细胞核等超微结构均未发生明显的形态改变:注药侧(右侧〕和对照侧(左侧)输卵管上皮细胞内虽有少数线粒体膨胀,但两组间无论在线粒体数目,膨胀线粒体百分率以及线粒体外膜比表面等方面均无差异(P>0.1),电镜X—时线能谱分析表明:注药侧输卵管上皮细胞内铜元素的相对含量咯高于对照组,而且铜元素多畜集于线粒体内。  相似文献   
53.
The advent of the small computer as a basic clinical tool will have a significant impact on clinical practice and medical training. The application of probability theory to clinical diagnosis has led to the development of several practical diagnostic programs which run on small computers. Expert systems--interactive programs which function as 'electronic consultants'--have now been successfully developed for a number of clinical situations. Experience with two of these, INTERNIST/CADUCEUS and MYCIN, has provided insight into problems and prospects for expert systems in medicine. Less complex programs, particularly those employing clinical prediction rules, and expert system shells, seem well suited for clinical environments. Although computerized medical diagnosis holds great promise as an aid to clinicians, its success will largely be determined by the quality of the information that clinicians provide for analysis. A brief review of the status of bedside diagnosis reveals that data-gathering strategies and techniques must be better understood. In order to take full advantage of computer programs for diagnosis, basic diagnostic skills must be more heavily emphasized in clinical training.  相似文献   
54.
During their first training period in general practice the authors felt that they did not encounter the balanced workload which is the foundation for learning to be a GP. Previous studies confirmed the existence of differences in overall and specific workload between trainees and trainers. From their own experience and from the relevant literature they addressed several factors which might affect the workload of trainees. A study was undertaken to determine differences in workload between trainees and trainers, and to investigate whether certain characteristics of practice and of trainees affect the workload of trainees. Details of surgery consultations with 34 trainee-trainer partnerships were recorded in the north of the Netherlands over 2 weeks. Questionnaires were filled in by trainers, trainees and practice assistants from these 34 general practices. The total number of contacts recorded was 10,103. It was found that trainees see fewer elderly and female patients, less chronic and oncological conditions, but more minor illnesses. They see only 30% of patients with problem behaviour. Factors that influence the trainees' workload, as compared to their trainers' are: list size; selection in the allocation of patients; trainee's experience prior to starting the training stage, and the trainee's sex. Except for problem behaviour, trainees generally see a cross-section of their trainer's practice population. Selection would provide a more balanced workload for trainees.  相似文献   
55.
The purpose of this study was to compare the attitudes toward basic sciences of students in a preclinical problem-based curriculum and a conventional lecture-based curriculum at the end of their second year of medical school. The results showed that the PBL class had more positive attitudes toward basic sciences than students in the conventional class. These results may reflect a learning environment where students meet many scientist role models as teachers and where basic science is learnt in the context of clinical problems.  相似文献   
56.
An investigation was undertaken to determine the factors influencing performance of medical students at the Faculty of Medicine, University of Kuwait. Data were collected for the first batch of 42 candidates who successfully passed the 7-year medical programme. Results showed high correlations between high-school admission grades and subsequent performance during the medical programme. Similar results were also obtained with English proficiency. A partial correlation controlling for English proficiency, however, showed a systematic decline in the magnitude of the correlations between high-school grades and performance during the medical programme. In fact the relationship between high-school GPA and clinical GPA was non-significant. A prominent influence of English proficiency on performance is indicated.  相似文献   
57.
岛津数字胃肠机IF OVER故障产生的原理及维修   总被引:1,自引:0,他引:1  
雷烈 《医疗设备信息》2007,22(6):113-113
分析了岛津3200数字胃肠机IFOVER故障产生的原因,并结合实际故障现象,具体介绍了排除方法。  相似文献   
58.
59.
An automated multiphasic-health-test system has been opened in Japan for the early detection and treatment of disease in adults. The centre utilises system simulation, digital computation and automated medical equipment, and has made it possible to handle many examinees daily, and to retrieve their data easily. This paper reports many new data and their analysis.  相似文献   
60.
Medical students on the radiology elective in our institution create electronic presentations to present to each other as part of the requirements for the rotation. Access was given to previous students presentations via the web-based system, Medical Imaging Resource Center (MIRC) project, created and supported by the Radiological Society of North America (RSNA). RadPix Power 2 MIRC (Weadock Software, LLC, Ann Arbor, MI) software converted the Microsoft PowerPoint (Redmond, WA) presentations to a MIRC-compatible format. The textual information on each slide is searchable across the entire MIRC database. Future students will be able to benefit from the work of their predecessors.  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