首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1314109篇
  免费   103776篇
  国内免费   2075篇
耳鼻咽喉   18777篇
儿科学   45360篇
妇产科学   35902篇
基础医学   187745篇
口腔科学   34487篇
临床医学   116124篇
内科学   264866篇
皮肤病学   28458篇
神经病学   103989篇
特种医学   52627篇
外国民族医学   717篇
外科学   201004篇
综合类   27892篇
现状与发展   1篇
一般理论   419篇
预防医学   100190篇
眼科学   28880篇
药学   97510篇
  2篇
中国医学   2440篇
肿瘤学   72570篇
  2018年   13727篇
  2017年   10431篇
  2016年   11420篇
  2015年   12887篇
  2014年   17976篇
  2013年   27493篇
  2012年   37754篇
  2011年   39805篇
  2010年   23862篇
  2009年   22714篇
  2008年   38320篇
  2007年   40900篇
  2006年   41201篇
  2005年   40113篇
  2004年   39273篇
  2003年   37918篇
  2002年   37202篇
  2001年   65055篇
  2000年   67635篇
  1999年   57404篇
  1998年   15610篇
  1997年   14176篇
  1996年   14584篇
  1995年   13835篇
  1994年   13110篇
  1993年   12103篇
  1992年   45350篇
  1991年   44289篇
  1990年   42980篇
  1989年   40873篇
  1988年   37672篇
  1987年   36893篇
  1986年   34275篇
  1985年   32912篇
  1984年   24683篇
  1983年   20718篇
  1982年   12028篇
  1981年   10987篇
  1980年   9803篇
  1979年   21862篇
  1978年   15246篇
  1977年   12898篇
  1976年   12044篇
  1975年   12945篇
  1974年   15029篇
  1973年   14483篇
  1972年   13267篇
  1971年   12017篇
  1970年   11310篇
  1969年   10273篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
Background: Poor anger regulation is considered a risk factor of aggression in individuals with mild or borderline intellectual disabilities. Psychomotor therapy (PMT) targets anger regulation through body- and movement-oriented interventions. This study aims to inform practitioners on efficacy and research-base of PMT in this population.

Method: This systematic review evaluated nine studies which met inclusion criteria in terms of participants, intervention procedures, outcomes and certainty of evidence.

Results: Seven studies revealed a substantial reduction of aggressive behaviour or anger. Certainty of evidence was rated inconclusive in most cases due to absence of experimental control.

Conclusions: We can conclude that body-oriented PMT, involving progressive relaxation and meditation procedure “Soles of the Feet”, is a promising approach. However, the paucity of studies and methodological limitations preclude classifying it as an evidence-based practice. This suggests stronger methodological research and research aimed at PMT’s mechanisms of action (e.g., improved interoceptive awareness) is warranted.  相似文献   

42.
43.
44.
45.

Background

Resistin is an immunometabolic mediator that is elevated in several inflammatory disorders. A ligand for Toll-like receptor 4, resistin modulates the recruitment and activation of myeloid cells, notably neutrophils. Neutrophils are major drivers of cystic fibrosis (CF) lung disease, in part due to the release of human neutrophil elastase- and myeloperoxidase-rich primary granules, leading to tissue damage. Here we assessed the relationship of resistin to CF lung disease.

Methods

Resistin levels were measured in plasma and sputum from three retrospective CF cohorts spanning a wide range of disease. We also assessed the ability of neutrophils to secrete resistin upon activation in vitro. Finally, we constructed a multivariate model assessing the relationship between resistin levels and lung function.

Results

Plasma resistin levels were only marginally higher in CF than in healthy control subjects. By contrast, sputum resistin levels were very high in CF, reaching 50–100 fold higher levels than in plasma. Among CF patients, higher plasma resistin levels were associated with allergic bronchopulmonary aspergillosis, and higher sputum resistin levels were associated with CF-related diabetes. Mechanistically, in vitro release of neutrophil primary granules was concomitant with resistin secretion. Overall, sputum resistin levels were negatively correlated with CF lung function, independently of other variables (age, sex, and genotype).

Conclusions

Our data establish relationships between resistin levels in the plasma and sputum of CF patients that correlate with disease status, and identify resistin as a novel mechanistic link between neutrophilic inflammation and lung disease in CF.  相似文献   
46.
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   
47.
48.
Haemophilia is a common cause of genetically inherited bleeding disorders. Pseudotumours occur in 1–2 % of persons with severe forms of haemophilia. These are a result of repeated haemorrhage into soft tissues, subperiosteum or a site of bone fracture with inadequate resorption of the extravasated blood. There are a number of therapeutic alternatives for this dangerous condition: surgical removal, percutaneous management, irradiation, embolization etc. In this case report, we describe the natural history, clinical course and successful surgical management of a patient with haemophilia who presented with a massive pseudotumour. We also briefly review the relevant literature on the various therapeutic modalities that have been implemented in the management of this rare complication. Though surgeons may be averse to operate on haemophiliacs, primary surgical management as done in our case may prove to be the definitive treatment option for such patients.  相似文献   
49.
50.
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   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号