全文获取类型
收费全文 | 3591篇 |
免费 | 293篇 |
国内免费 | 38篇 |
专业分类
耳鼻咽喉 | 50篇 |
儿科学 | 117篇 |
妇产科学 | 66篇 |
基础医学 | 522篇 |
口腔科学 | 45篇 |
临床医学 | 389篇 |
内科学 | 763篇 |
皮肤病学 | 157篇 |
神经病学 | 185篇 |
特种医学 | 299篇 |
外科学 | 398篇 |
综合类 | 139篇 |
一般理论 | 2篇 |
预防医学 | 450篇 |
眼科学 | 29篇 |
药学 | 149篇 |
中国医学 | 3篇 |
肿瘤学 | 159篇 |
出版年
2021年 | 47篇 |
2019年 | 36篇 |
2018年 | 46篇 |
2017年 | 36篇 |
2016年 | 44篇 |
2015年 | 58篇 |
2014年 | 79篇 |
2013年 | 147篇 |
2012年 | 122篇 |
2011年 | 103篇 |
2010年 | 91篇 |
2009年 | 112篇 |
2008年 | 130篇 |
2007年 | 129篇 |
2006年 | 112篇 |
2005年 | 117篇 |
2004年 | 102篇 |
2003年 | 111篇 |
2002年 | 110篇 |
2001年 | 103篇 |
2000年 | 113篇 |
1999年 | 96篇 |
1998年 | 110篇 |
1997年 | 103篇 |
1996年 | 118篇 |
1995年 | 68篇 |
1994年 | 95篇 |
1993年 | 62篇 |
1992年 | 73篇 |
1991年 | 77篇 |
1990年 | 73篇 |
1989年 | 94篇 |
1988年 | 86篇 |
1987年 | 84篇 |
1986年 | 63篇 |
1985年 | 62篇 |
1984年 | 47篇 |
1983年 | 35篇 |
1982年 | 34篇 |
1981年 | 36篇 |
1980年 | 30篇 |
1979年 | 49篇 |
1978年 | 32篇 |
1977年 | 41篇 |
1976年 | 36篇 |
1975年 | 35篇 |
1973年 | 28篇 |
1972年 | 31篇 |
1971年 | 31篇 |
1970年 | 27篇 |
排序方式: 共有3922条查询结果,搜索用时 15 毫秒
21.
22.
23.
A D Hurley 《Research in developmental disabilities》1989,10(3):261-275
Although most mental health professionals doubt the capacity of mentally retarded patients to benefit from psychotherapy, a review of case studies, writings, and research revealed that mentally retarded patients responded positively to treatment. Practitioners familiar with this population developed six major recommendations for adapting psychotherapeutic approaches to mentally retarded patients. In order for therapy to be successful, it is recommended that clinicians adapt standard technique to the patient's cognitive level, be directive in approach, be flexible during therapy, engage significant others in the therapeutic process, carefully manage transference and countertransference issues, and directly address the issue of mental retardation as a disability. The results of three research studies suggested that mentally retarded patients benefit from psychotherapy, although a fourth study showed negative results. There is a great need for systematic research to develop a knowledge base to support the growing applications of psychotherapeutic methods to this population. 相似文献
24.
Rupture of an intra-aortic balloon counterpulsator (IABCP) demands immediate removal. We report a case of thrombus formation within a Datascope IABCP secondary to IABCP rupture, necessitating surgical exploration for removal. There is a disturbing pattern of balloon ruptures with this type of IABCP. 相似文献
25.
26.
27.
M Lefevre C L Keen B L?nnerdal L S Hurley B O Schneeman 《The Journal of nutrition》1986,116(9):1735-1746
Male Sprague-Dawley rats (10 per group) were fed diets adequate (control) or deficient (CuDef) in copper for 6 wk. In the CuDef group, plasma total cholesterol, high density lipoprotein (HDL) cholesterol and apoA-I levels were significantly higher than in controls. Apolipoprotein analysis of the HDL fractions revealed a relative enrichment of apoE in the CuDef group. Size analysis of 1.21 density lipoproteins by nondenaturing gradient gel electrophoresis demonstrated the presence of more material migrating in the size range of HDL1 in the CuDef group. Separation of HDL into apoE-rich and apoA-I-rich fractions by heparin-affinity chromatography confirmed the presence of increased apoE-rich HDL in the CuDef group. To determine the mechanism responsible for higher apoE-rich HDL in the CuDef group, the lipoprotein receptor binding activity in hepatic membranes from the control and CuDef group was assayed. Kinetic analysis of the binding data revealed that the lipoprotein binding assay was primarily measuring the activity of the HDL receptor, which is not apoE mediated. When corrected for differential enrichment of plasma membrane, hepatic membranes from the CuDef group bound significantly fewer lipoproteins than did controls. Furthermore, the hepatic receptor binding activity was negatively correlated with the proportion of HDL enriched with apoE. 相似文献
28.
Trace metals and immune function in the elderly 总被引:1,自引:0,他引:1
29.
30.