全文获取类型
收费全文 | 37750篇 |
免费 | 2743篇 |
国内免费 | 63篇 |
专业分类
耳鼻咽喉 | 339篇 |
儿科学 | 1324篇 |
妇产科学 | 1060篇 |
基础医学 | 5070篇 |
口腔科学 | 480篇 |
临床医学 | 5185篇 |
内科学 | 6799篇 |
皮肤病学 | 518篇 |
神经病学 | 3903篇 |
特种医学 | 719篇 |
外国民族医学 | 4篇 |
外科学 | 3297篇 |
综合类 | 360篇 |
一般理论 | 53篇 |
预防医学 | 5179篇 |
眼科学 | 590篇 |
药学 | 2496篇 |
中国医学 | 32篇 |
肿瘤学 | 3148篇 |
出版年
2024年 | 47篇 |
2023年 | 315篇 |
2022年 | 562篇 |
2021年 | 1227篇 |
2020年 | 745篇 |
2019年 | 1147篇 |
2018年 | 1290篇 |
2017年 | 909篇 |
2016年 | 1081篇 |
2015年 | 1116篇 |
2014年 | 1490篇 |
2013年 | 2114篇 |
2012年 | 3091篇 |
2011年 | 3339篇 |
2010年 | 1729篇 |
2009年 | 1470篇 |
2008年 | 2711篇 |
2007年 | 2690篇 |
2006年 | 2493篇 |
2005年 | 2366篇 |
2004年 | 2111篇 |
2003年 | 1852篇 |
2002年 | 1878篇 |
2001年 | 246篇 |
2000年 | 194篇 |
1999年 | 239篇 |
1998年 | 357篇 |
1997年 | 285篇 |
1996年 | 210篇 |
1995年 | 203篇 |
1994年 | 159篇 |
1993年 | 146篇 |
1992年 | 86篇 |
1991年 | 62篇 |
1990年 | 64篇 |
1989年 | 54篇 |
1988年 | 46篇 |
1987年 | 50篇 |
1986年 | 43篇 |
1985年 | 30篇 |
1984年 | 38篇 |
1983年 | 48篇 |
1982年 | 55篇 |
1981年 | 28篇 |
1980年 | 30篇 |
1979年 | 12篇 |
1978年 | 9篇 |
1977年 | 14篇 |
1974年 | 15篇 |
1973年 | 9篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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
2.
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
3.
4.
Kuo-yi Jade Chang MHealthEc MHM BSc Lisa Lorraine Dillon MSpecEd BPsych Lil Deverell COMS PhD MEd GradDipO&M BEd Mei Ying Boon PhD BOptom FAAO Lisa Keay PhD MPH BOptom 《Clinical & experimental optometry》2020,103(4):434-448
Despite orientation and mobility (O&M) being a significant factor determining quality of life of people with low vision or blindness, there are no gold standard measures or agreement on how to measure O&M performance. In the first part of this systematic review, an inventory of O&M outcome measures used by recent studies to assess the performance of orientation and/or mobility of adults with vision impairment (low vision and blindness) is presented. A wide variety of O&M outcome measures have been implemented in different fields of study, such as epidemiologic research and interventional studies evaluating training, assistive technology, vision rehabilitation and vision restoration. The most frequent aspect of outcome measures is efficiency such as time, distance, speed and percentage of preferred walking speed, followed by obstacle contacts and avoidance, and dis/orientation and veering. Other less commonly used aspects are target identification, safety and social interaction and self-reported outcome measures. Some studies employ sophisticated equipment to capture and analyse O&M performance in a laboratory setting, while others carry out their assessment in real-world indoor or outdoor environments. In the second part of this review, the appropriateness of implementing the identified outcome measures to assess O&M performance in clinical and functional O&M practice is evaluated. Nearly a half of these outcome measures meet all four criteria of face validity (either clinical or functional), responsiveness, reliability and feasibility and have the potential to be implemented in clinical or functional O&M practice. The findings of this review confirm the complicated and dynamic nature of O&M. Multiple measures are required in any evaluation of O&M performance to facilitate holistic assessment of O&M abilities and limitations of each individual. 相似文献
5.
6.
Metabolism describes the series of chemical reactions that are concerned with the provision of energy to biological systems. They may be divided into reactions involved in energy yield (catabolism: demand exceeds supply), and energy storage (anabolism: supply exceeds demand). Regulation of these pathways is critical for homeostasis, and derangements in metabolism are seen in a wide variety of pathological processes. Understanding metabolism is key to the treatment of many diseases, notably diabetes, as well as underpinning clinical nutritional support. 相似文献
7.
8.
9.
10.