全文获取类型
收费全文 | 140587篇 |
免费 | 9712篇 |
国内免费 | 618篇 |
专业分类
耳鼻咽喉 | 1529篇 |
儿科学 | 4186篇 |
妇产科学 | 2355篇 |
基础医学 | 18625篇 |
口腔科学 | 2455篇 |
临床医学 | 14076篇 |
内科学 | 30435篇 |
皮肤病学 | 1708篇 |
神经病学 | 13231篇 |
特种医学 | 4451篇 |
外国民族医学 | 1篇 |
外科学 | 20416篇 |
综合类 | 1914篇 |
现状与发展 | 1篇 |
一般理论 | 165篇 |
预防医学 | 12022篇 |
眼科学 | 3932篇 |
药学 | 9784篇 |
1篇 | |
中国医学 | 326篇 |
肿瘤学 | 9304篇 |
出版年
2023年 | 638篇 |
2022年 | 985篇 |
2021年 | 2633篇 |
2020年 | 1595篇 |
2019年 | 2739篇 |
2018年 | 3156篇 |
2017年 | 2334篇 |
2016年 | 2670篇 |
2015年 | 3057篇 |
2014年 | 4445篇 |
2013年 | 6291篇 |
2012年 | 9497篇 |
2011年 | 10101篇 |
2010年 | 5595篇 |
2009年 | 5245篇 |
2008年 | 9061篇 |
2007年 | 9616篇 |
2006年 | 9190篇 |
2005年 | 9185篇 |
2004年 | 8703篇 |
2003年 | 8057篇 |
2002年 | 7734篇 |
2001年 | 1498篇 |
2000年 | 1188篇 |
1999年 | 1482篇 |
1998年 | 1650篇 |
1997年 | 1416篇 |
1996年 | 1093篇 |
1995年 | 1128篇 |
1994年 | 947篇 |
1993年 | 909篇 |
1992年 | 874篇 |
1991年 | 775篇 |
1990年 | 712篇 |
1989年 | 668篇 |
1988年 | 674篇 |
1987年 | 648篇 |
1986年 | 569篇 |
1985年 | 626篇 |
1984年 | 692篇 |
1983年 | 664篇 |
1982年 | 827篇 |
1981年 | 729篇 |
1980年 | 648篇 |
1979年 | 468篇 |
1978年 | 444篇 |
1977年 | 451篇 |
1976年 | 370篇 |
1975年 | 331篇 |
1974年 | 347篇 |
排序方式: 共有10000条查询结果,搜索用时 316 毫秒
1.
Dongbing Lai Emma C. Johnson Sarah Colbert Gayathri Pandey Grace Chan Lance Bauer Meredith W. Francis Victor Hesselbrock Chella Kamarajan John Kramer Weipeng Kuang Sally Kuo Samuel Kuperman Yunlong Liu Vivia McCutcheon Zhiping Pang Martin H. Plawecki Marc Schuckit Jay Tischfield Leah Wetherill Yong Zang Howard J. Edenberg Bernice Porjesz Arpana Agrawal Tatiana Foroud 《Alcoholism, clinical and experimental research》2022,46(3):374-383
2.
Anela Stanic Denis Rybin Francis Cannata Carole Hohl Jennifer Brody Jessie Gaeta 《AIDS care》2021,33(1):1-9
ABSTRACT The lack of stable housing can impair access and continuity of care for patients living with human immunodeficiency virus (HIV). This study investigated the relationship between housing status assessed at multiple time points and several core HIV-related outcomes within the same group of HIV patients experiencing homelessness. Patients with consistently stable housing (CSH) during the year were compared to patients who lacked CSH (non-CSH group). The study outcomes included HIV viral load (VL), CD4 counts, and health care utilization. Multivariable and propensity weighted analyses were used to assess outcomes adjusting for potential group differences. Of 208 patients, 88 (42%) had CSH and 120 (58%) were non-CSH. Patients with CSH had significantly higher proportion of VL suppression and higher mean CD4 counts. The frequency of nurse visits in the CSH group was less than a half of that in the non-CSH group. Patients with CSH were less likely to be admitted to the medical respite facility, and if admitted, their length of stay was about a half of that for the non-CSH group. Our study findings show that patients with CSH had significantly better HIV virologic control and immune status as well as improved health care utilization. 相似文献
3.
4.
5.
Evelyne Harkemanne Jean‐Louis Dargent Pierre‐Paul Roquet‐Gravy Audrey Bulinckx 《Pediatric dermatology》2019,36(3):365-367
We report a case of benign lymphoplasmacytic plaque (LPP) in a child. These asymptomatic erythematous papulonodular lesions are an emerging clinicopathological entity. Herein, we describe a previously unreported site for LPP lesions, namely, the volar wrist and the distal ipsilateral palm. 相似文献
6.
Breanne E. Kunstler Jill L. Cook Joanne L. Kemp Paul D. O’Halloran Caroline F. Finch 《Journal of Science and Medicine in Sport》2019,22(1):2-10
Objectives
To determine: (i) the behaviour change techniques used by a sample of Australian physiotherapists to promote non-treatment physical activity; and (ii) whether those behaviour change techniques are different to the techniques used to encourage adherence to rehabilitation exercises.Design
Cross-sectional survey.Method
An online self-report survey was advertised to private practice and outpatient physiotherapists treating patients with musculoskeletal conditions. The use of 50 behaviour change techniques were measured using five-point Likert-type scale questions.Results
Four-hundred and eighty-six physiotherapists responded to the survey, with 216 surveys fully completed. Most respondents (85.1%) promoted non-treatment physical activity often or all of the time. Respondents frequently used 29 behaviour change techniques to promote non-treatment physical activity or encourage adherence to rehabilitation exercises. A similar number of behaviour change techniques was frequently used to encourage adherence to rehabilitation exercises (n = 28) and promote non-treatment physical activity (n = 26). Half of the behaviour change techniques included in the survey were frequently used for both promoting non-treatment physical activity and encouraging adherence to rehabilitation exercises (n = 25). Graded tasks was the most, and punishment was the least, frequently reported technique used to promote non-treatment physical activity and encourage adherence to rehabilitation exercises.Conclusions
Respondents reported using similar behaviour change techniques to promote non-treatment physical activity and encourage adherence to rehabilitation exercises. The variability in behaviour change technique use suggests the behaviour the physiotherapist is promoting influences their behaviour change technique choice. Including the frequently-used behaviour change techniques in non-treatment physical activity promotion interventions might improve their efficacy. 相似文献7.
8.
9.
10.
Dynamic LVOT Obstruction and Aortic Stenosis in the Same Patient: A Case of Challenging Doppler Hemodynamics
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Matthew W. Parker M.D. Francis J. Kiernan M.D. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(6):1030-1032
We present a patient with both dynamic left ventricular outflow tract obstruction and valvular aortic stenosis. The aortic valve was calcified, and velocities and gradients measured by continuous‐wave Doppler met standard criteria for severe aortic stenosis. The increased subvalvular velocities invalidated assumptions of the simplified Bernoulli equation; correction using the longer form of the Bernoulli equation suggested a lower but still significant gradient. The complex shape of the subvalvular spectral Doppler envelope indicated supranormal systolic function and dynamic left ventricular outflow obstruction. Left heart catheterization with an end‐hole catheter was required to determine the subvalvular and valvular components of the obstruction. 相似文献