全文获取类型
收费全文 | 312525篇 |
免费 | 45422篇 |
国内免费 | 1741篇 |
专业分类
耳鼻咽喉 | 4652篇 |
儿科学 | 8318篇 |
妇产科学 | 6852篇 |
基础医学 | 30886篇 |
口腔科学 | 9635篇 |
临床医学 | 46304篇 |
内科学 | 69556篇 |
皮肤病学 | 6160篇 |
神经病学 | 32649篇 |
特种医学 | 10893篇 |
外国民族医学 | 13篇 |
外科学 | 51723篇 |
综合类 | 3808篇 |
现状与发展 | 42篇 |
一般理论 | 308篇 |
预防医学 | 32814篇 |
眼科学 | 6691篇 |
药学 | 16323篇 |
4篇 | |
中国医学 | 387篇 |
肿瘤学 | 21670篇 |
出版年
2023年 | 5688篇 |
2022年 | 2459篇 |
2021年 | 6089篇 |
2020年 | 7229篇 |
2019年 | 5376篇 |
2018年 | 10628篇 |
2017年 | 10329篇 |
2016年 | 11043篇 |
2015年 | 11830篇 |
2014年 | 16170篇 |
2013年 | 20596篇 |
2012年 | 16965篇 |
2011年 | 17989篇 |
2010年 | 14734篇 |
2009年 | 16130篇 |
2008年 | 17177篇 |
2007年 | 17019篇 |
2006年 | 17656篇 |
2005年 | 16679篇 |
2004年 | 15495篇 |
2003年 | 14301篇 |
2002年 | 13681篇 |
2001年 | 4005篇 |
2000年 | 3002篇 |
1999年 | 4000篇 |
1998年 | 4961篇 |
1997年 | 4359篇 |
1996年 | 4207篇 |
1995年 | 3679篇 |
1994年 | 2906篇 |
1993年 | 2662篇 |
1992年 | 2286篇 |
1991年 | 2074篇 |
1990年 | 1892篇 |
1989年 | 1779篇 |
1988年 | 1832篇 |
1987年 | 1678篇 |
1986年 | 1623篇 |
1985年 | 1693篇 |
1984年 | 1972篇 |
1983年 | 1957篇 |
1982年 | 2165篇 |
1981年 | 1944篇 |
1980年 | 1786篇 |
1979年 | 1103篇 |
1978年 | 1241篇 |
1977年 | 1164篇 |
1976年 | 1035篇 |
1975年 | 845篇 |
1974年 | 849篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Interprofessional collaboration and communication in nursing homes: a qualitative exploration of problems in medical care for nursing home residents – study protocol
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
32.
33.
The human visual system is amenable to a number of adaptive processes; one such process, or collection of processes, is the adaptation to blur. Blur adaptation can be observed as an improvement in vision under degraded conditions, and these changes occur relatively rapidly following exposure to blur. The potential important future directions of this research area and the clinical implications of blur adaptation are discussed. 相似文献
34.
35.
Xin Yi Wong Andrew Qi Jun Lim Qianyu Shen John Whay Kuang Chia Min Hoe Chew Wah Siew Tan 《Current medical research and opinion》2020,36(10):1677-1686
Abstract
Objective
Ras wild-type metastatic colorectal cancers (mCRC) may be treated with anti-vascular endothelial growth factor (VEGF) or anti-epidermal growth factor receptor (EGFR) agents. We aim to estimate patients’ preferences for mCRC treatment and relative importance of cost, efficacy improvement, avoidance of side effects and therapy convenience, and relative uptake between profiles that resemble Bevacizumab (anti-VEGF) and Cetuximab (anti-EGFR), two commonly prescribed mCRC targeted therapies. 相似文献36.
37.
38.
Quality of life in stroke survivor–caregiver dyads: a new conceptual framework and longitudinal study protocol
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
39.
Cost‐Effectiveness and Cost‐Utility Analysis of Spinal Cord Stimulation in Patients With Failed Back Surgery Syndrome: Results From the PRECISE Study
下载免费PDF全文
![点击此处可从《Neuromodulation》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Furio Zucco MD Roberta Ciampichini MSc Angelo Lavano MD Amedeo Costantini MD Marisa De Rose MD Paolo Poli MD Gianpaolo Fortini MD Laura Demartini MD Enrico De Simone MD Valentino Menardo MD Piero Cisotto MD Mario Meglio MD Luciana Scalone PhD Lorenzo G. Mantovani DSc 《Neuromodulation》2015,18(4):266-276
40.
Emma J. Kilford Iroise Dumontheil Nicholas W. Wood Sarah-Jayne Blakemore 《Social cognitive and affective neuroscience》2015,10(6):777-782
The catechol-O-methyltransferase (COMT) enzyme is a major determinant of prefrontal dopamine levels. The Val158Met polymorphism affects COMT enzymatic activity and has been associated with variation in executive function and affective processing. This study investigated the effect of COMT genotype on the flexible modulation of the balance between processing self-generated and processing stimulus-oriented information, in the presence or absence of affective distractors. Analyses included 124 healthy adult participants, who were also assessed on standard working memory (WM) tasks. Relative to Val carriers, Met homozygotes made fewer errors when selecting and manipulating self-generated thoughts. This effect was partly accounted for by an association between COMT genotype and visuospatial WM performance. We also observed a complex interaction between the influence of affective distractors, COMT genotype and sex on task accuracy: male, but not female, participants showed a sensitivity to the affective distractors that was dependent on COMT genotype. This was not accounted for by WM performance. This study provides novel evidence of the role of dopaminergic genetic variation on the ability to select and manipulate self-generated thoughts. The results also suggest sexually dimorphic effects of COMT genotype on the influence of affective distractors on executive function. 相似文献