全文获取类型
收费全文 | 2393131篇 |
免费 | 186717篇 |
国内免费 | 9797篇 |
专业分类
耳鼻咽喉 | 30648篇 |
儿科学 | 78193篇 |
妇产科学 | 65446篇 |
基础医学 | 339553篇 |
口腔科学 | 65948篇 |
临床医学 | 225408篇 |
内科学 | 474423篇 |
皮肤病学 | 52823篇 |
神经病学 | 198570篇 |
特种医学 | 92323篇 |
外国民族医学 | 622篇 |
外科学 | 352316篇 |
综合类 | 55311篇 |
现状与发展 | 3篇 |
一般理论 | 838篇 |
预防医学 | 200636篇 |
眼科学 | 51842篇 |
药学 | 172198篇 |
11篇 | |
中国医学 | 4916篇 |
肿瘤学 | 127617篇 |
出版年
2018年 | 26439篇 |
2017年 | 20380篇 |
2016年 | 23279篇 |
2015年 | 26347篇 |
2014年 | 36578篇 |
2013年 | 56001篇 |
2012年 | 72233篇 |
2011年 | 77279篇 |
2010年 | 46562篇 |
2009年 | 44272篇 |
2008年 | 71252篇 |
2007年 | 75581篇 |
2006年 | 76860篇 |
2005年 | 74293篇 |
2004年 | 70831篇 |
2003年 | 68161篇 |
2002年 | 65363篇 |
2001年 | 109621篇 |
2000年 | 112710篇 |
1999年 | 94604篇 |
1998年 | 28210篇 |
1997年 | 25354篇 |
1996年 | 25947篇 |
1995年 | 25546篇 |
1994年 | 23930篇 |
1993年 | 22428篇 |
1992年 | 77372篇 |
1991年 | 75535篇 |
1990年 | 72895篇 |
1989年 | 69264篇 |
1988年 | 64375篇 |
1987年 | 63096篇 |
1986年 | 59937篇 |
1985年 | 57615篇 |
1984年 | 43901篇 |
1983年 | 37026篇 |
1982年 | 22916篇 |
1981年 | 20463篇 |
1980年 | 19159篇 |
1979年 | 39712篇 |
1978年 | 28771篇 |
1977年 | 23901篇 |
1976年 | 22737篇 |
1975年 | 23472篇 |
1974年 | 28125篇 |
1973年 | 27181篇 |
1972年 | 25119篇 |
1971年 | 23275篇 |
1970年 | 21394篇 |
1969年 | 19809篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
105.
For many parents stopping life-sustaining medical treatment on their dying infant is psychologically impossible. Dostoevsky's insights into human behavior, particularly the fact that individuals do not want the anxiety and guilt associated with responsibility for making difficult decisions, might change the way physicians approach parents for permission to withdraw life-prolonging medical interventions on dying infants. 相似文献
106.
L Laforest E Van Ganse G Devouassoux S Chretin L Osman G Bauguil Y Pacheco G Chamba 《The European respiratory journal》2006,27(1):42-50
French asthma patients may be supervised by general practitioners (GPs) and/or specialists. Therefore, this study examined asthma management in patients exclusively supervised by specialists (SPE), GPs, (GP) and both (GP+SPE group), and compared the findings. Asthma patients were consecutively recruited in 348 pharmacies. Each patient completed a questionnaire providing data on personal characteristics, asthma management, perception of disease and asthma supervision. Asthma control was measured using the Asthma Control Test. Questionnaires were linked to computerised records of medications which had been dispensed before inclusion in the study. From the 1,256 patients (mean age = 36.1 yrs, 54.3% females), 11.4, 36.6, and 52.0% were placed in the SPE, GP, and GP+SPE groups, respectively. During the previous 4 weeks, most patients in the SPE group were properly controlled (52.2 versus 26.4 and 21.5% in GP and GP+SPE groups, respectively). The SPE group made more use of fixed combinations of long-acting beta agonist and inhaled corticosteroid, while receiving less short-acting beta agonists, antitussives and antibiotics. Striking differences in symptoms and asthma management were observed according to the type of asthma supervision. The current results strongly support the need to improve the management of asthma in primary care, and the coordination of care between general practitioners and specialists. 相似文献
107.
108.
Four clinical trials of porcine islet transplantation have been reported, and there are verbal reports that clinical trials on much larger scales are continuing in centers in China and Russia. The four reported trials are briefly reviewed and, in the light of the present status of experimental islet xenotransplantation, consideration is given to whether such trials are currently justified. The Ethics Committee of the International Xenotransplantation Association has (1) emphasized the need for encouraging studies in non-human primates before clinical trials should be undertaken, (2) mandatory monitoring for the transfer of porcine microorganisms, and (3) careful regulation and oversight by recognized bodies. Other aspects of the topic, such as the need for informed consent, are briefly discussed. We conclude that, at the present time, more data documenting convincing efficacy, focused on clinically applicable immunosuppressive regimens, are needed to justify the initiation of closely monitored clinical trials. A clinical trial may then be justified even though the potential risk to the patients, and possibly for society, will not be zero. 相似文献
109.
M. Lenartowicz M. Kowal D. Buda-Lewandowska J. Styrna 《Journal of inherited metabolic disease》2003,25(8):647-659
Summary: The mosaic (Atp7a
mo-ms
) is an X-linked, lethal mutation in mice. In mosaic mutant males, many clinical features characteristic of defective copper metabolism have been observed and they die at the age of 15 days, exhibiting strongsimilarities to the brindled and macular mutants. About 4% of the mutant males live to sexual maturity and some of them are fertile. In this paper, alterationsin the structure of the kidney from adult mutants are described. Owing to an inherited defect of efflux, copper is accumulated in the kidney of the mutants up to a toxic level and this leads to severe damage of the renal cortex. Pathological changes in the kidney mostly affected the structure of the renal corpuscle and renaltubules. 相似文献
110.
Claire M Rickard Brigit L Roberts Jonathon Foote Matthew R McGrail 《Dimensions of critical care nursing》2006,25(5):234-242
Research coordinators in intensive care are a growing specialty about which little is known. This cross-sectional study surveyed the Australia and New Zealand Intensive Care Research Coordinators' Group (n = 49) regarding demographics, education, employment history, job structure, and role content. Most research coordinators were highly qualified and experienced nurses who undertake pharmaceutical trials, multicenter projects, departmental medical and nursing research, audits and data registries, and their own projects. 相似文献