全文获取类型
收费全文 | 277213篇 |
免费 | 17785篇 |
国内免费 | 1856篇 |
专业分类
耳鼻咽喉 | 3340篇 |
儿科学 | 5745篇 |
妇产科学 | 4614篇 |
基础医学 | 40538篇 |
口腔科学 | 6455篇 |
临床医学 | 26302篇 |
内科学 | 55114篇 |
皮肤病学 | 6804篇 |
神经病学 | 24947篇 |
特种医学 | 13316篇 |
外国民族医学 | 6篇 |
外科学 | 39309篇 |
综合类 | 2421篇 |
现状与发展 | 5篇 |
一般理论 | 165篇 |
预防医学 | 17591篇 |
眼科学 | 6324篇 |
药学 | 21775篇 |
2篇 | |
中国医学 | 1699篇 |
肿瘤学 | 20382篇 |
出版年
2023年 | 1710篇 |
2022年 | 3934篇 |
2021年 | 7141篇 |
2020年 | 4014篇 |
2019年 | 5711篇 |
2018年 | 7041篇 |
2017年 | 5596篇 |
2016年 | 6884篇 |
2015年 | 8894篇 |
2014年 | 11380篇 |
2013年 | 14190篇 |
2012年 | 21540篇 |
2011年 | 21718篇 |
2010年 | 12412篇 |
2009年 | 11252篇 |
2008年 | 17582篇 |
2007年 | 17884篇 |
2006年 | 16684篇 |
2005年 | 16445篇 |
2004年 | 15090篇 |
2003年 | 13896篇 |
2002年 | 12707篇 |
2001年 | 4504篇 |
2000年 | 3892篇 |
1999年 | 3717篇 |
1998年 | 2986篇 |
1997年 | 2296篇 |
1996年 | 1921篇 |
1995年 | 1737篇 |
1994年 | 1525篇 |
1993年 | 1437篇 |
1992年 | 1515篇 |
1991年 | 1474篇 |
1990年 | 1247篇 |
1989年 | 1148篇 |
1988年 | 1020篇 |
1987年 | 1036篇 |
1986年 | 837篇 |
1985年 | 900篇 |
1984年 | 894篇 |
1983年 | 756篇 |
1982年 | 887篇 |
1981年 | 863篇 |
1980年 | 728篇 |
1979年 | 586篇 |
1978年 | 537篇 |
1977年 | 519篇 |
1976年 | 474篇 |
1975年 | 413篇 |
1974年 | 388篇 |
排序方式: 共有10000条查询结果,搜索用时 9 毫秒
11.
Hommes Franziska Mohsenpour Amir Kropff Dana Pilgram Lisa Matusall Svenja von Philipsborn Peter Sell Kerstin 《Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz》2022,65(1):96-106
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz - Akteure der öffentlichen Gesundheit (Public Health) tragen wesentlich zu Gesundheitsschutz, -förderung und... 相似文献
12.
Post-induction hypotension is common and associated with postoperative complications. We hypothesised that pneumatic leg compression reduces post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy. In this double-blind randomised study, patients were allocated randomly to the pneumatic leg compression group (n = 50) or control (n = 50). In the intervention group, pneumatic leg compression was initiated before induction of anaesthesia. In the control group, pneumatic leg compression was initiated 20 min after anaesthesia induction. The primary outcome was the incidence of post-induction hypotension in these groups. Post-induction hypotension was defined as systolic blood pressure < 90 mmHg during the first 20 min after induction. Haemodynamic variables and area under the curve of post-induction systolic blood pressure over time were assessed. Complications associated with pneumatic leg compression were recorded, including: peripheral neuropathy; compartment syndrome; extensive bullae beneath the leg sleeves; and pulmonary thromboembolism. The incidence of post-induction hypotension decreased in the pneumatic leg compression group compared with that in the control group; 5 (10%) vs. 29 (58%), respectively, p < 0.001. In the pneumatic leg compression group, the lowest systolic, diastolic and mean blood pressures 20 min after induction of anaesthesia were significantly greater than the control group. Pneumatic leg compression resulted in an increased area under the curve of systolic blood pressure in the first 20 min after induction, p = 0.001. There were no pneumatic leg compression-related complications. Pneumatic leg compression reduced post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy, suggesting that it is an effective and safe intervention to prevent post-induction hypotension among elderly patients undergoing general anaesthesia. 相似文献
13.
14.
15.
BackgroundLittle is known about the extent of ordering low-value services by.PurposeTo compare the rates of low-value back images ordered by primary care physicians (PCMDs) and primary care nurse practitioners (PCNPs).MethodWe used 2012 and 2013 Medicare Part B claims for all beneficiaries in 18 hospital referral ?regions (HRRs) and a measure of low-value back imaging from Choosing Wisely. Models included random clinician effect and fixed effects for beneficiary age, disability, Elixhauser comorbidities, clinician sex, the emergency department setting, back pain visit volume, organization, and region (HRR).FindingsPCNPs (N = 231) and PCMDs (N = 4,779) order low-value back images at similar rates (NP: all images: 26.5%; MRI/CT: 8.4%; MD: all images: 24.5%; MRI/CT: 7.7%), with no detectable significant difference when controlling for covariates.DiscussionPCNPs and PCMDs order low-value back images at an effectively similar rate. 相似文献
16.
17.
18.
19.