首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   406344篇
  免费   18674篇
  国内免费   461篇
耳鼻咽喉   5025篇
儿科学   14027篇
妇产科学   11942篇
基础医学   58461篇
口腔科学   8254篇
临床医学   31287篇
内科学   78330篇
皮肤病学   6977篇
神经病学   31806篇
特种医学   16518篇
外国民族医学   43篇
外科学   65828篇
综合类   8614篇
现状与发展   1篇
一般理论   164篇
预防医学   29895篇
眼科学   8270篇
药学   26640篇
中国医学   801篇
肿瘤学   22596篇
  2021年   2469篇
  2019年   2455篇
  2018年   15381篇
  2017年   12243篇
  2016年   14556篇
  2015年   4103篇
  2014年   5154篇
  2013年   7911篇
  2012年   12869篇
  2011年   20368篇
  2010年   14600篇
  2009年   11947篇
  2008年   20034篇
  2007年   23433篇
  2006年   10187篇
  2005年   11749篇
  2004年   11928篇
  2003年   12797篇
  2002年   11064篇
  2001年   13746篇
  2000年   14313篇
  1999年   11763篇
  1998年   3354篇
  1997年   3179篇
  1996年   2884篇
  1995年   2805篇
  1994年   2608篇
  1992年   8536篇
  1991年   8698篇
  1990年   8478篇
  1989年   8282篇
  1988年   7492篇
  1987年   7270篇
  1986年   6881篇
  1985年   6679篇
  1984年   4899篇
  1983年   4245篇
  1982年   2617篇
  1979年   4551篇
  1978年   3325篇
  1977年   2779篇
  1976年   2594篇
  1975年   2851篇
  1974年   3405篇
  1973年   3393篇
  1972年   3136篇
  1971年   2964篇
  1970年   2876篇
  1969年   2630篇
  1968年   2566篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
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.
Two Janus-associated kinase inhibitors (JAKi) (initially ruxolitinib and, more recently, fedratinib) have been approved as treatment options for patients who have intermediate-risk and high-risk myelofibrosis (MF), with pivotal trials demonstrating improvements in spleen volume, disease symptoms, and quality of life. At the same time, however, clinical trial experiences with JAKi agents in MF have demonstrated a high frequency of discontinuations because of adverse events or progressive disease. In addition, overall survival benefits and clinical and molecular predictors of response have not been established in this population, for which the disease burden is high and treatment options are limited. Consistently poor outcomes have been documented after JAKi discontinuation, with survival durations after ruxolitinib ranging from 11 to 16 months across several studies. To address such a high unmet therapeutic need, various non-JAKi agents are being actively explored (in combination with ruxolitinib in first-line or salvage settings and/or as monotherapy in JAKi-pretreated patients) in phase 3 clinical trials, including pelabresib (a bromodomain and extraterminal domain inhibitor), navitoclax (a B-cell lymphoma 2/B-cell lymphoma 2-xL inhibitor), parsaclisib (a phosphoinositide 3-kinase inhibitor), navtemadlin (formerly KRT-232; a murine double-minute chromosome 2 inhibitor), and imetelstat (a telomerase inhibitor). The breadth of data expected from these trials will provide insight into the ability of non-JAKi treatments to modify the natural history of MF.  相似文献   
4.

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   
5.
6.
7.
8.
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号