全文获取类型
收费全文 | 1695578篇 |
免费 | 123330篇 |
国内免费 | 3781篇 |
专业分类
耳鼻咽喉 | 21730篇 |
儿科学 | 55636篇 |
妇产科学 | 46151篇 |
基础医学 | 241211篇 |
口腔科学 | 48741篇 |
临床医学 | 151315篇 |
内科学 | 333483篇 |
皮肤病学 | 38651篇 |
神经病学 | 131136篇 |
特种医学 | 63868篇 |
外国民族医学 | 242篇 |
外科学 | 257223篇 |
综合类 | 38946篇 |
现状与发展 | 4篇 |
一般理论 | 531篇 |
预防医学 | 124225篇 |
眼科学 | 40211篇 |
药学 | 123604篇 |
7篇 | |
中国医学 | 4475篇 |
肿瘤学 | 101299篇 |
出版年
2021年 | 12785篇 |
2019年 | 13521篇 |
2018年 | 19950篇 |
2017年 | 15213篇 |
2016年 | 16613篇 |
2015年 | 18957篇 |
2014年 | 26214篇 |
2013年 | 37940篇 |
2012年 | 52726篇 |
2011年 | 55420篇 |
2010年 | 32771篇 |
2009年 | 30693篇 |
2008年 | 51516篇 |
2007年 | 54794篇 |
2006年 | 55253篇 |
2005年 | 52540篇 |
2004年 | 50738篇 |
2003年 | 48147篇 |
2002年 | 46368篇 |
2001年 | 91782篇 |
2000年 | 93605篇 |
1999年 | 76960篇 |
1998年 | 19717篇 |
1997年 | 17267篇 |
1996年 | 17391篇 |
1995年 | 16742篇 |
1994年 | 15289篇 |
1993年 | 14071篇 |
1992年 | 57381篇 |
1991年 | 55272篇 |
1990年 | 52970篇 |
1989年 | 50747篇 |
1988年 | 46131篇 |
1987年 | 44937篇 |
1986年 | 42226篇 |
1985年 | 39987篇 |
1984年 | 29348篇 |
1983年 | 24908篇 |
1982年 | 13898篇 |
1979年 | 25529篇 |
1978年 | 17574篇 |
1977年 | 14906篇 |
1976年 | 13874篇 |
1975年 | 14563篇 |
1974年 | 17630篇 |
1973年 | 16944篇 |
1972年 | 15673篇 |
1971年 | 14453篇 |
1970年 | 13431篇 |
1969年 | 12517篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
941.
A. Perez S. E. Clements E. Benton A. Robson B. Bhogal C. M. Stefanato D. McGibbon 《Clinical and experimental dermatology》2009,34(8):e931-e933
We report a case of localized bullous pemphigoid (BP) in a woman patient with primary lymphoedema tarda. There is only one previous case reported of localized pemphigoid in an area of lymphoedema, this being of the cicatricial variant. Slow circulation in the lymphatic vessels, increased capillary permeability with preferential localization of antibodies in the area, and potential cleavage of the epidermal junction due to increased hydrostatic pressure leading to autoimmunity, have all been advocated as possible pathogenic mechanisms. Nevertheless, we consider that the mechanism by which localized pemphigoid arises on lymphoedema remains elusive, based on a previous case of generalized BP sparing an area of postsurgical lymphoedema. 相似文献
942.
943.
944.
945.
946.
In 2002/2005, separate energy requirement equations were generated by the Institute of Medicine's (IOM) Dietary Reference Intake process for normal weight and overweight/obese children and adolescents. The current paper questions the theoretical rationale of having two sets of equations (based solely on body-weight classification): when body weight is considered, overweight and obese children and adolescents do not seem to differ from their normal weight counterparts in energy expended for basal metabolism or physical activity tasks. However, energy needs for weight maintenance among overweight/obese girls were consistently higher when predicted using the equations for overweight/obese individuals compared with those developed for normal weight individuals. In contrast, among overweight/obese boys, they were consistently lower . Although the differences are within the variability of the estimates, even theoretical support for a higher energy intake (as occurs in girls) seems unwise because of the potential contribution to a higher body mass in children who are already at risk. It is the opinion of the authors that the IOM revisit the use of two separate equations and generate one set that is appropriate for all children and adolescents. 相似文献
947.
948.
949.
950.