全文获取类型
收费全文 | 17059篇 |
免费 | 3113篇 |
国内免费 | 280篇 |
专业分类
耳鼻咽喉 | 845篇 |
儿科学 | 713篇 |
妇产科学 | 294篇 |
基础医学 | 846篇 |
口腔科学 | 513篇 |
临床医学 | 2233篇 |
内科学 | 4031篇 |
皮肤病学 | 588篇 |
神经病学 | 1668篇 |
特种医学 | 700篇 |
外科学 | 4068篇 |
综合类 | 247篇 |
现状与发展 | 2篇 |
一般理论 | 1篇 |
预防医学 | 1062篇 |
眼科学 | 640篇 |
药学 | 488篇 |
中国医学 | 26篇 |
肿瘤学 | 1487篇 |
出版年
2024年 | 103篇 |
2023年 | 551篇 |
2022年 | 243篇 |
2021年 | 540篇 |
2020年 | 848篇 |
2019年 | 355篇 |
2018年 | 848篇 |
2017年 | 757篇 |
2016年 | 940篇 |
2015年 | 890篇 |
2014年 | 1217篇 |
2013年 | 1364篇 |
2012年 | 845篇 |
2011年 | 777篇 |
2010年 | 924篇 |
2009年 | 1076篇 |
2008年 | 727篇 |
2007年 | 649篇 |
2006年 | 644篇 |
2005年 | 472篇 |
2004年 | 412篇 |
2003年 | 360篇 |
2002年 | 315篇 |
2001年 | 283篇 |
2000年 | 196篇 |
1999年 | 256篇 |
1998年 | 307篇 |
1997年 | 309篇 |
1996年 | 342篇 |
1995年 | 308篇 |
1994年 | 207篇 |
1993年 | 154篇 |
1992年 | 184篇 |
1991年 | 197篇 |
1990年 | 127篇 |
1989年 | 177篇 |
1988年 | 148篇 |
1987年 | 121篇 |
1986年 | 123篇 |
1985年 | 127篇 |
1984年 | 102篇 |
1983年 | 97篇 |
1982年 | 88篇 |
1981年 | 57篇 |
1980年 | 66篇 |
1979年 | 60篇 |
1978年 | 63篇 |
1977年 | 55篇 |
1975年 | 64篇 |
1972年 | 52篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
Ethan J. Halpern Jacob P. Deutsch Maria M. Hannaway Adrian T. Estepa Anand S. Kenia Kenneth J. Neuburger David C. Levin 《The American journal of emergency medicine》2013,31(10):1479-1485
ObjectiveThe objective of the study is to evaluate cardiac risk factors and risk scores for prediction of coronary artery disease (CAD) and adverse outcomes in an emergency department (ED) population judged to be at low to intermediate risk for acute coronary syndrome.MethodsInformed consent was obtained from consecutive ED patients who presented with chest pain and were evaluated with coronary computed tomography angiography (cCTA). Cardiac risk factors, clinical presentation, electrocardiogram, and laboratory studies were recorded; the Thrombolysis in Myocardial Infarction (TIMI) and Global Registry of Acute Coronary Events (GRACE) scores were tabulated. Coronary computed tomography angiography findings were rated on a 6-level plaque burden scale and classified for significant CAD (stenosis ≥ 50%). Adverse cardiovascular outcomes were recorded at 30 days.ResultsAmong 250 patients evaluated by cCTA, 143 (57%) had no CAD, 64 (26%) demonstrated minimal plaque (< 30% stenosis), 26 (10%) demonstrated mild plaque (< 50% stenosis), 9 (4%) demonstrated moderate single vessel disease (50%-70% stenosis), 2 (1%) demonstrated moderate multivessel disease, and 6 (2%) demonstrated severe disease (> 70% stenosis). Six patients developed adverse cardiovascular outcomes. Among traditional cardiac risk factors, only age (older) and sex (male) were significant independent predictors of CAD. Correlation with CAD was poor for the TIMI (r = 0.12) and GRACE (r = 0.09-0.23) scores. The TIMI and GRACE scores were not useful to predict adverse outcomes. Coronary computed tomography angiography identified severe CAD in all subjects with adverse outcomes.ConclusionAmong ED patients who present with chest pain judged to be at low to intermediate risk for acute coronary syndrome, traditional risk factors are not useful to stratify risk for CAD and adverse outcomes. Coronary computed tomography angiography is an excellent predictor of CAD and outcome. 相似文献
152.
153.
This article outlines the importance of assessing both within-child and environmental strengths for children and adolescents admitted to residential treatment facilities (RTFs). Discussed are the theoretical underpinnings behind strength-based assessment, as well as a number of organizations and initiatives that aim at raising the bar for children's care, creating a holistic viewpoint. Assessments such as the BASC-2, ASEBA, and Vineland-II are well-established measures that have moved to meet these demands, and measures like the BERS-2, RSCA, and DESSA have an overt strengths orientation. The CASA and the DCASC are omnibus strengths measures that can be utilized to fill the “intake gap.” 相似文献
154.
155.
156.
Rebecca Erwin Wells MD MPH Catherine E. Kerr PhD Jennifer Wolkin PhD Michelle Dossett MD PhD Roger B. Davis ScD Jacquelyn Walsh BS Robert B. Wall MDiv MSN Jian Kong MD MPH Ted Kaptchuk Daniel Press MD Russell S. Phillips MD Gloria Yeh MD MPH 《Journal of the American Geriatrics Society》2013,61(4):642-645
157.
158.
159.
160.
Jibu Joseph Michael Mullen Andrew McAuley Anand Pillai 《Archives of orthopaedic and trauma surgery》2010,130(12):1433-1438