全文获取类型
收费全文 | 192226篇 |
免费 | 2018篇 |
国内免费 | 145篇 |
专业分类
耳鼻咽喉 | 1329篇 |
儿科学 | 7073篇 |
妇产科学 | 3623篇 |
基础医学 | 18348篇 |
口腔科学 | 2048篇 |
临床医学 | 13745篇 |
内科学 | 34090篇 |
皮肤病学 | 1030篇 |
神经病学 | 17180篇 |
特种医学 | 9568篇 |
外国民族医学 | 11篇 |
外科学 | 31800篇 |
综合类 | 2632篇 |
现状与发展 | 2篇 |
一般理论 | 11篇 |
预防医学 | 19547篇 |
眼科学 | 3243篇 |
药学 | 11052篇 |
中国医学 | 761篇 |
肿瘤学 | 17296篇 |
出版年
2023年 | 218篇 |
2022年 | 639篇 |
2021年 | 1119篇 |
2020年 | 610篇 |
2019年 | 768篇 |
2018年 | 22810篇 |
2017年 | 17857篇 |
2016年 | 20022篇 |
2015年 | 1503篇 |
2014年 | 1646篇 |
2013年 | 1750篇 |
2012年 | 8337篇 |
2011年 | 22455篇 |
2010年 | 19621篇 |
2009年 | 12096篇 |
2008年 | 20299篇 |
2007年 | 22495篇 |
2006年 | 1331篇 |
2005年 | 2926篇 |
2004年 | 4019篇 |
2003年 | 4934篇 |
2002年 | 3007篇 |
2001年 | 390篇 |
2000年 | 505篇 |
1999年 | 245篇 |
1998年 | 266篇 |
1997年 | 267篇 |
1996年 | 155篇 |
1995年 | 159篇 |
1994年 | 151篇 |
1993年 | 105篇 |
1992年 | 81篇 |
1991年 | 136篇 |
1990年 | 175篇 |
1989年 | 119篇 |
1988年 | 99篇 |
1987年 | 83篇 |
1986年 | 59篇 |
1985年 | 66篇 |
1984年 | 57篇 |
1983年 | 56篇 |
1982年 | 57篇 |
1980年 | 60篇 |
1974年 | 32篇 |
1970年 | 26篇 |
1969年 | 27篇 |
1938年 | 61篇 |
1934年 | 30篇 |
1932年 | 56篇 |
1930年 | 46篇 |
排序方式: 共有10000条查询结果,搜索用时 265 毫秒
991.
ObjectiveThe prognostic value of MAC severity is important not only because it shares a common risk factors with vascular atherosclerotic changes but also through increasing the cardiovascular morbidity and mortality. This study was conducted in order to evaluate association between severity of MAC and left sided echocardiographic abnormalities mainly left sided valvular abnormalities as well as left atrial systolic and diastolic functional abnormalities.MethodsWe prospectively obtained 12-leads electrocardiograms and transthoracic echocardiograms (TTE) on patients scheduled for non-emergent echocardiographic assessment at tertiary care hospital. MAC was graded as mild, moderate and severe. LA linear dimensions, LA filling and emptying volumes and left atrium ejection fraction were done specifically in addition to commonly measured TTE parameters.ResultsFrom the 80 patients considered for the study, 47 patients had mild MAC, 29 patients had moderate MAC and 4 patients had severe MAC. Valvular affection through echo-doppler assessment that included mainly mitral stenosis, mitral incompetence, aortic sclerosis as well as aortic incompetence showed a highly significant statistical difference (p-values 0.00, 0.00, 0.00 and 0.00 respectively). There was a highly significant statistical difference between patients with different degrees of MAC and LA linear dimension (p-value 0.00), all LA filling and emptying volumes as well as LA ejection fractions with the exception of LA passive emptying volume and LA passive ejection fraction was insignificant.ConclusionsThere is a direct proportionate relationship between severity of MAC and associated left sided valvular affection, increase LA linear dimension as well as lower overall LA function. 相似文献
992.
An assessment of the construct validity of the CHU9D in the Australian adolescent general population
Julie Ratcliffe Katherine Stevens Terry Flynn John Brazier Michael Sawyer 《Quality of life research》2012,21(4):717-725
Purpose
To assess the construct validity of the CHU9D in an adolescent general population sample. The CHU9D is a new generic preference-based measure of health-related quality of life developed specifically for application in the economic evaluation of health care treatments and interventions for young people. 相似文献993.
994.
995.
Ljiljana Vlaški Dragan Dankuc Nada Vučković Vladimir Kljajić Danijela Dragičević Slobodanka Lemajić-Komazec 《Central European Journal of Medicine》2012,7(3):344-348
Aim
The aim of this paper is to present two case reports of patients with hemangiomas of the external auditory canal, and to overview all cases published in English language literature so far. 相似文献996.
997.
DeMarc A. Hickson Tené T. Lewis Jiankang Liu David L. Mount Sinead N. Younge William C. Jenkins Daniel F. Sarpong David R. Williams 《Annals of behavioral medicine》2012,43(1):4-14
Background
Discrimination may be adversely associated with abdominal obesity, but few studies have examined associations with abdominal fat. 相似文献998.
999.
1000.
There has been tremendous progress in treatment of heart disease in children. Device therapy is increasingly being used in acyanotic congenital heart disease, while surgical results have improved significantly to give smile to many cyanotic heart disease children and their parents. This article makes an attempt to increase awareness of general pediatricians about common congenital heart diseases. 相似文献