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   90244篇
  免费   8649篇
  国内免费   567篇
耳鼻咽喉   259篇
儿科学   2046篇
妇产科学   1703篇
基础医学   5583篇
口腔科学   4393篇
临床医学   16510篇
内科学   7954篇
皮肤病学   681篇
神经病学   5281篇
特种医学   896篇
外科学   3497篇
综合类   8251篇
现状与发展   3篇
一般理论   102篇
预防医学   35773篇
眼科学   419篇
药学   3117篇
  82篇
中国医学   887篇
肿瘤学   2023篇
  2024年   357篇
  2023年   2854篇
  2022年   3691篇
  2021年   5096篇
  2020年   5150篇
  2019年   5041篇
  2018年   4314篇
  2017年   4008篇
  2016年   3808篇
  2015年   3748篇
  2014年   5895篇
  2013年   7716篇
  2012年   5053篇
  2011年   5552篇
  2010年   4127篇
  2009年   4257篇
  2008年   4168篇
  2007年   4174篇
  2006年   3551篇
  2005年   2744篇
  2004年   2374篇
  2003年   2041篇
  2002年   1528篇
  2001年   1469篇
  2000年   1266篇
  1999年   881篇
  1998年   748篇
  1997年   583篇
  1996年   490篇
  1995年   342篇
  1994年   318篇
  1993年   327篇
  1992年   262篇
  1991年   225篇
  1990年   182篇
  1989年   145篇
  1988年   173篇
  1987年   115篇
  1986年   101篇
  1985年   111篇
  1984年   78篇
  1983年   52篇
  1982年   46篇
  1981年   43篇
  1980年   51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 4 毫秒
101.
In this century, the use of pesticides and fertilizers (agrochemicals) is indispensable because they are seen as a panacea for protecting crops from insects and diseases. However, the manner in which these agrochemicals are handled poses significant health risks to manufacturers, transporters, vendors and farmers. In Kenya, for example, coffee factory workers (specifically storekeepers) apportion the agrochemicals and sell them to the coffee farmers. The process of apportioning and other factors expose these workers to health risks. In order to evaluate the extent of the problem, a pilot study was undertaken in the Githuguri location. The results showed that lack of use of protective clothing, poor handling of agrochemicals and poorly designed storage facilities were very common. As a result, 95% of the workers interviewed reported a variety of agrochemical health related problems. In conclusion, the government and the public role regarding possible preventive measures were proposed.  相似文献   
102.
After a brief historical introduction, the future of psychiatry is discussed by considering trends in mental disorder, treatment ideology, research and evolution of society in general with a focus on western Europe and North America.  相似文献   
103.
104.
This paper describes a teaching programme for final- (sixth-) year undergraduate medical students during their 10-week term in child health. Students attend schools on two occasions and are actively involved in the physical, educational and emotional assessment of children. The advantages of the programme include active participation by the students, contact with children in a less threatening environment, learning new skills in the assessment of children, and knowledge of common screening procedures. Student evaluation of the programme has been positive.  相似文献   
105.
The role of selected prior medical conditions in the etiology of hematopoietic malignancies was examined in a case-control study of members of two regional branches of the Kaiser Permanente Medical Care Program (USA). Past history of chronic infectious, autoimmune, allergic, and musculoskeletal disorders was abstracted from medical records for leukemia (n = 299), non-Hodgkin's lymphoma (NHL, n = 100), and multiple myeloma (n = 175) cases and matched controls (n = 787). Little difference was found between cases and controls for most of the chronic conditions evaluated, including sinusitis, carbuncles, urinary tract infections, pelvic infections, herpes zoster, asthma, rheumatoid arthritis, psoriasis, bursitis, and gout. Only three statistically significant elevated risks were found, i.e., with combined disc disease myeloma among patients with prior eczema and disk and other musculoskeletal conditions, and NHL following tuberculosis. Only two of these associations showed consistent patterns by sex and geographic region (myeloma with eczema and with musculoskeletal conditions). While prior history of eczema and musculoskeletal conditions may slightly increase risk of myeloma, this study provided little if any support for an association of chronic infectious, autoimmune, allergic, and musculoskeletal conditions with subsequent occurrence of the leukemias or NHL. Additionally, these data did not support a role for chronic antigenic stimulation, as defined in previous epidemiologic studies, in the etiology of hematopoietic malignancies.Ms Doody and Drs Linet, Pottern, Boice, and Fraumeni are with the Epidemiology and Biostatistics Program, National Cancer Institute. Dr Glass is with the Kaiser Permanente Medical Care Program, Northwest Region, Portland, Oregon, USA. Dr Friedman is with the Kaiser Permanente Medical Care Program, Northern California Region, Oakland, California, USA. Address correspondence to Ms Doody, Radiation Epidemiology Branch, National Cancer Institute, Executive Plaza North, Room 408, Bethesda, MD 20892, USA. This research was supported in part by National Cancer Institute contracts NO1-CP-01047, NO1-CP-01054, NO1-CP-11009, NO1-CP-11037, NO1-CP-31035, and NO1-CP-61006.  相似文献   
106.
The aim of this study was to test the inter-rater reliability of a revised oral assessment guide (ROAG) for patients residing in a geriatric rehabilitation ward. A consecutive sample of 140 patients was recruited for the study. Oral assessments were performed for 133 newly admitted patients by one registered nurse (RN) during a period of six months. A dental hygienist (DH) carried out 103 oral assessments during the same half-year. For 66 patients, the RN and the DH performed independent assessments. There was an agreement between the RN and the DH in the majority of the independent assessments, except for tongue and teeth/dentures. The percentage agreement exceeded 80 percent. Inter-rater agreement measured by Cohen's Kappa coefficient ranged from moderate to very good and percentage agreement had a range of 58 to 91 percent. The agreement was highest in assessment of voice and swallowing (91%). Assessments of teeth and dentures seemed to be most difficult for the RN to evaluate. ROAG was found to be a clinically useful assessment tool. Additional education and training is needed to improve the reliability of the oral assessments and should include continuous support from a dental hygienist as well as a pictorial manual on how to use the ROAG.  相似文献   
107.
108.
109.
护理人员的职业损伤因素及健康维护   总被引:27,自引:0,他引:27  
作者指出临床一线的护理人员是发生职业损伤的高危群体。产生职业损伤的危险因素包括基础教育和继续教育缺乏职业损伤及其防范知识;影响护理人员身体健康的诸因素,如化疗专用的溶药设备、洁净操作台或相对密闭的溶药环境不健全;乙型肝炎等医院内易感性等疾病增加,被血液、体液等污染的医疗锐器刺伤是护理人员职业感染的主要途径;护理人员工作职业特点对健康不利的影响,护理人员心理压力大。为维护护理人员身心健康,应加入医院感染、职业损伤和健康维护的在校理论教育内容,加强护理人员职业安全教育,采取防范职业损伤的措施,如化疗药物中心配药、使用一次性手套等措施。  相似文献   
110.
Summary: Summary. A study was conducted to determine whether the attitudes of medical students to death and caring changed during the 3 months following exposure to cadaver dissection. All first-year students were invited to complete a questionnaire immediately before their initial cadaver dissection experience, after 6 weeks, and after a further 3 months. The questionnaire reflected attitudes to death, violent death, death of someone known to the respondent and caring when someone known to the respondent is seriously injured. Ethnicity and previous exposure to dying has no effect on responses, but overall men students' reactions were significantly less than for women ( P < 0.001). The responses given on the final part of the questionnaire after 3 months were significantly lower than those to most questions in the first part of the questionnaire. The exceptions were those questions where the subject in the given scenario was known to the respondent, where reactions were rated significantly greater ( P < 0.001) in the follow-up questionnaire and can be explained on the basis that they were a personal referent.
Students rapidly develop a coping mechanism which enables them to view cadaver dissection as an occupation quite divorced from living human beings. During these early months of training solicitude decreases for those who die who are unknown to them, but concern for personal referents increases. Educators should be aware of the dramatic change of attitudes among students and the process of professionalization which might influence their caring of future patients.  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