全文获取类型
收费全文 | 46815篇 |
免费 | 8017篇 |
国内免费 | 228篇 |
专业分类
耳鼻咽喉 | 937篇 |
儿科学 | 1430篇 |
妇产科学 | 1171篇 |
基础医学 | 3468篇 |
口腔科学 | 3266篇 |
临床医学 | 6911篇 |
内科学 | 11025篇 |
皮肤病学 | 761篇 |
神经病学 | 3828篇 |
特种医学 | 1927篇 |
外国民族医学 | 1篇 |
外科学 | 7614篇 |
综合类 | 494篇 |
现状与发展 | 12篇 |
一般理论 | 18篇 |
预防医学 | 4782篇 |
眼科学 | 1206篇 |
药学 | 1846篇 |
中国医学 | 77篇 |
肿瘤学 | 4286篇 |
出版年
2024年 | 173篇 |
2023年 | 1188篇 |
2022年 | 535篇 |
2021年 | 974篇 |
2020年 | 1458篇 |
2019年 | 915篇 |
2018年 | 1770篇 |
2017年 | 1654篇 |
2016年 | 1865篇 |
2015年 | 1966篇 |
2014年 | 2552篇 |
2013年 | 3296篇 |
2012年 | 2092篇 |
2011年 | 2090篇 |
2010年 | 2176篇 |
2009年 | 2723篇 |
2008年 | 2115篇 |
2007年 | 2021篇 |
2006年 | 2169篇 |
2005年 | 1901篇 |
2004年 | 1751篇 |
2003年 | 1617篇 |
2002年 | 1512篇 |
2001年 | 982篇 |
2000年 | 866篇 |
1999年 | 877篇 |
1998年 | 788篇 |
1997年 | 748篇 |
1996年 | 752篇 |
1995年 | 650篇 |
1994年 | 529篇 |
1993年 | 462篇 |
1992年 | 633篇 |
1991年 | 557篇 |
1990年 | 517篇 |
1989年 | 483篇 |
1988年 | 479篇 |
1987年 | 451篇 |
1986年 | 405篇 |
1985年 | 366篇 |
1984年 | 320篇 |
1983年 | 345篇 |
1982年 | 293篇 |
1981年 | 244篇 |
1980年 | 208篇 |
1979年 | 213篇 |
1978年 | 203篇 |
1977年 | 200篇 |
1976年 | 169篇 |
1974年 | 151篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
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
3.
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
4.
5.
6.
Dynamic LVOT Obstruction and Aortic Stenosis in the Same Patient: A Case of Challenging Doppler Hemodynamics 下载免费PDF全文
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
7.
Maaike van Gerwen MD Naomi Alpert MS Raja Flores MD Emanuela Taioli MD PhD 《American journal of industrial medicine》2020,63(2):115-120
The association between asbestos exposure, mainly in occupational settings, and malignant mesothelioma has been well established; this has prompted several countries to establish mesothelioma epidemiologic surveillance programs often at the request of national agencies. This review compares currently existing mesothelioma registries worldwide to develop a concept model for a US real-time case capture mesothelioma registry. Five countries were identified with a mesothelioma specific registry, including Italy, France, UK, Australia, and South Korea. All, except the UK, used interviews to collect exposure data. Linkage with the national death index was available or was in future plans for all registries. The registries have limited information on treatment, quality of life, and other patient-centered outcomes such as symptoms and pain management. To thoroughly collect exposure data, “real-time” enrollment is preferable; to maximize the capture of mesothelioma cases, optimal coverage, and a simplified consent process are needed. 相似文献
8.
Chie Teramoto PHN RN MS Satoko Nagata PhD PHN RN Reiko Okamoto PhD PHN RN Ruriko Suzuki PHN RN MS Emiko Kishi PhD PHN RN Michie Nomura DSN PHN RN Noriko Jojima PHN RN MS Masumi Nishida PhD PHN RN Keiko Koide PhD PHN RN Emiko Kusano PhD PHN RN Saori Iwamoto PhD PHN RN Sachiyo Murashima PhD PHN RN 《Public health nursing (Boston, Mass.)》2015,32(6):654-661
9.
10.