全文获取类型
收费全文 | 11857篇 |
免费 | 730篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 55篇 |
儿科学 | 445篇 |
妇产科学 | 325篇 |
基础医学 | 1501篇 |
口腔科学 | 75篇 |
临床医学 | 2154篇 |
内科学 | 1989篇 |
皮肤病学 | 110篇 |
神经病学 | 1000篇 |
特种医学 | 242篇 |
外科学 | 1030篇 |
综合类 | 136篇 |
一般理论 | 8篇 |
预防医学 | 1756篇 |
眼科学 | 95篇 |
药学 | 694篇 |
中国医学 | 7篇 |
肿瘤学 | 981篇 |
出版年
2023年 | 59篇 |
2022年 | 109篇 |
2021年 | 191篇 |
2020年 | 118篇 |
2019年 | 187篇 |
2018年 | 243篇 |
2017年 | 225篇 |
2016年 | 190篇 |
2015年 | 222篇 |
2014年 | 367篇 |
2013年 | 569篇 |
2012年 | 819篇 |
2011年 | 897篇 |
2010年 | 499篇 |
2009年 | 453篇 |
2008年 | 778篇 |
2007年 | 875篇 |
2006年 | 843篇 |
2005年 | 914篇 |
2004年 | 911篇 |
2003年 | 843篇 |
2002年 | 773篇 |
2001年 | 94篇 |
2000年 | 67篇 |
1999年 | 108篇 |
1998年 | 147篇 |
1997年 | 126篇 |
1996年 | 98篇 |
1995年 | 80篇 |
1994年 | 79篇 |
1993年 | 93篇 |
1992年 | 60篇 |
1991年 | 56篇 |
1990年 | 49篇 |
1989年 | 29篇 |
1988年 | 41篇 |
1987年 | 23篇 |
1986年 | 28篇 |
1985年 | 30篇 |
1984年 | 46篇 |
1983年 | 35篇 |
1982年 | 44篇 |
1981年 | 36篇 |
1980年 | 32篇 |
1979年 | 19篇 |
1978年 | 12篇 |
1977年 | 17篇 |
1974年 | 9篇 |
1973年 | 8篇 |
1972年 | 9篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
4.
Study DesignSystematic review.IntroductionContrast baths are used as an intervention in hand therapy, yet it is unclear which patients, if any, benefit from this intervention.Purpose of the StudyTo examine the nature and quality of the evidence regarding the use of contrast baths using a systematic review process.MethodsOf a total of 28 clinical research articles on contrast baths, from 1938 forward, ten met the inclusion criteria set by the authors.ResultsThese studies addressed the physiological changes of hot and cold on blood flow, intramuscular temperature, subcutaneous temperature, and the influence of room temperature and age. The subjects included normal/healthy volunteers and patients with a diagnosis of rheumatoid arthritis, diabetes, or foot/ankle injuries. The diversity of conditions, protocols, and outcomes limited the ability to make definitive conclusions on efficacy.ConclusionsThe contrast bath procedure may increase superficial blood flow and skin temperature, though the evidence on the impact on edema is conflicting. No relationship between physiologic effects and functional outcomes has been established.Level of Evidence: 2A 相似文献
5.
6.
The recent development of brain atlases with computer graphics templates, and of huge databases of neurohistochemical data on the internet, has forced a systematic re-examination of errors associated with comparing histological features between adjacent sections of the same brain, between brains treated in the same way, and between brains from groups treated in different ways. The long-term goal is to compare as accurately as possible a broad array of data from experimental brains within the framework of reference atlases. Main sources of error, each of which ideally should be measured and minimized, include intrinsic biological variation, linear and nonlinear distortion of histological sections, plane of section differences between each brain, section alignment problems, and sampling errors. These variables are discussed, along with approaches to error estimation and minimization in terms of a specific example—the distribution of neuroendocrine neurons in the rat paraventricular nucleus. Based on the strategy developed here, the main conclusion is that the best long-term solution is a high-resolution 3D computer graphics model of the brain that can be sliced in any plane and used as the framework for quantitative neuroanatomy, databases, knowledge management systems, and structure–function modeling. However, any approach to the automatic annotation of neuroanatomical data—relating its spatial distribution to a reference atlas—should deal systematically with these sources of error, which reduce localization reliability. 相似文献
7.
8.
9.
10.