全文获取类型
收费全文 | 1956676篇 |
免费 | 152285篇 |
国内免费 | 3286篇 |
专业分类
耳鼻咽喉 | 27130篇 |
儿科学 | 60945篇 |
妇产科学 | 55486篇 |
基础医学 | 288917篇 |
口腔科学 | 56314篇 |
临床医学 | 178926篇 |
内科学 | 375934篇 |
皮肤病学 | 41141篇 |
神经病学 | 158585篇 |
特种医学 | 75001篇 |
外国民族医学 | 419篇 |
外科学 | 288755篇 |
综合类 | 46475篇 |
现状与发展 | 4篇 |
一般理论 | 805篇 |
预防医学 | 159613篇 |
眼科学 | 45254篇 |
药学 | 145125篇 |
6篇 | |
中国医学 | 3434篇 |
肿瘤学 | 103978篇 |
出版年
2018年 | 19382篇 |
2016年 | 16579篇 |
2015年 | 19203篇 |
2014年 | 26945篇 |
2013年 | 41316篇 |
2012年 | 55928篇 |
2011年 | 59369篇 |
2010年 | 34513篇 |
2009年 | 32900篇 |
2008年 | 56107篇 |
2007年 | 60428篇 |
2006年 | 59911篇 |
2005年 | 58760篇 |
2004年 | 56886篇 |
2003年 | 54592篇 |
2002年 | 52939篇 |
2001年 | 83545篇 |
2000年 | 85070篇 |
1999年 | 72010篇 |
1998年 | 21008篇 |
1997年 | 19185篇 |
1996年 | 19467篇 |
1995年 | 18262篇 |
1994年 | 17280篇 |
1993年 | 16225篇 |
1992年 | 58934篇 |
1991年 | 57817篇 |
1990年 | 56330篇 |
1989年 | 54503篇 |
1988年 | 50895篇 |
1987年 | 50034篇 |
1986年 | 47591篇 |
1985年 | 45424篇 |
1984年 | 34935篇 |
1983年 | 30309篇 |
1982年 | 18511篇 |
1981年 | 16923篇 |
1979年 | 34360篇 |
1978年 | 25157篇 |
1977年 | 20992篇 |
1976年 | 19388篇 |
1975年 | 21125篇 |
1974年 | 25875篇 |
1973年 | 25192篇 |
1972年 | 24042篇 |
1971年 | 22271篇 |
1970年 | 21202篇 |
1969年 | 20188篇 |
1968年 | 18563篇 |
1967年 | 16862篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
Amosova E. N. Shilova I. V. Zueva E. P. Rybalkina O. Yu. 《Pharmaceutical Chemistry Journal》2020,54(7):721-724
Pharmaceutical Chemistry Journal - Three extracts were produced from the above-ground part of the meadowsweet Filipendula ulmaria (L.) Maxim. using water, 40% ethanol, and 70% ethanol. Comparative... 相似文献
73.
Caroline E. Sloan Judy Zhong Dinushika Mohottige Rasheeda Hall Clarissa J. Diamantidis Leight E. Boulware Virginia Wang 《Seminars in dialysis》2020,33(6):440-448
Caring for patients with end-stage kidney disease (ESKD) in the United States is challenging, due in part to the complex epidemiology of the disease's progression as well as the ways in which care is delivered. As CKD progresses toward ESKD, the number of comorbidities increases and care involves multiple healthcare providers from multiple subspecialties. This occurs in the context of a fragmented US healthcare delivery system that is traditionally siloed by provider specialty, organization, as well as systems of payment and administration. This article describes the role of care fragmentation in the delivery of optimal ESKD care and identifies research gaps in the evidence across the continuum of care. We then consider the impact of care fragmentation on ESKD care from the patient and health system perspectives and explore opportunities for system-level interventions aimed at improving care for patients with ESKD. 相似文献
74.
75.
As millions of people turn to social media for health information, better understanding the factors that guide health-related judgments and perceptions in this context is imperative. We report on two Web experiments (n > 400 total) examining the power of society’s widespread weight bias and related stereotypes to influence nutrition judgments in social media spaces. In Experiment 1, meals were judged as lower in nutritional quality when the person who recommended them (the source) was depicted as obese rather than of normal weight, an effect mediated by stereotypic beliefs about the source as a generally unhealthy person. Experiment 2 replicated this effect, which—notably—remained significant when controlling for objective nutritional information (calories and fat content). Results highlight spillover effects of weight bias that extend beyond person perception to color impressions of objects (here, food) that are associated with stigmatized attributes. Implications for everyday nutrition judgments and public health are considered. 相似文献
76.
77.
78.
79.
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
80.