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   3366819篇
  免费   258452篇
  国内免费   7968篇
耳鼻咽喉   47579篇
儿科学   107099篇
妇产科学   91169篇
基础医学   478707篇
口腔科学   98090篇
临床医学   314374篇
内科学   646304篇
皮肤病学   68644篇
神经病学   280069篇
特种医学   132889篇
外国民族医学   1201篇
外科学   493502篇
综合类   77345篇
现状与发展   2篇
一般理论   1368篇
预防医学   282309篇
眼科学   78310篇
药学   250709篇
  12篇
中国医学   6775篇
肿瘤学   176782篇
  2018年   38548篇
  2017年   30301篇
  2016年   32136篇
  2015年   37257篇
  2014年   51051篇
  2013年   75936篇
  2012年   107110篇
  2011年   109198篇
  2010年   63536篇
  2009年   61029篇
  2008年   100153篇
  2007年   106714篇
  2006年   107641篇
  2005年   110776篇
  2004年   107924篇
  2003年   100407篇
  2002年   94536篇
  2001年   146791篇
  2000年   150507篇
  1999年   129293篇
  1998年   37617篇
  1997年   33982篇
  1996年   33422篇
  1995年   32328篇
  1994年   30303篇
  1993年   28366篇
  1992年   105542篇
  1991年   103016篇
  1990年   100035篇
  1989年   95960篇
  1988年   89166篇
  1987年   87612篇
  1986年   83441篇
  1985年   79551篇
  1984年   60270篇
  1983年   51356篇
  1982年   30835篇
  1981年   27361篇
  1979年   56575篇
  1978年   39869篇
  1977年   33239篇
  1976年   31612篇
  1975年   33694篇
  1974年   41444篇
  1973年   39719篇
  1972年   37219篇
  1971年   34668篇
  1970年   32496篇
  1969年   30097篇
  1968年   27840篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
51.
52.
53.

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   
54.
G. Berlin  M. Hammar  L. Tapper 《Platelets》2019,30(4):473-479
Platelets are needed to prevent or arrest bleeding and aggregate at the site of injury upon vascular damage. Platelets express receptors for estrogens which might affect the function of the platelets and their hemostatic ability. The aim was to identify possible differences in platelet function related to age, gender, and phases of the menstrual cycle by use of impedance aggregometry with Multiplate. In the first part of the study, platelet function was assessed in 60 healthy individuals (30 men and 30 women) in each of three age groups (20–25, 40–45, and 60–65 years). In the second part of the study, the platelet function was analyzed on four occasions during the menstrual cycle in women without oral contraceptives (OCs) (n = 17) and compared to 19 women on OCs and 18 men of similar age (20–40 years). For the women on OCs, aggregation was analyzed once during the tablet-free week and once late during the period with OCs. The men were sampled once. Women of younger age (<45 years) had significantly higher agonist-induced aggregation response than both men and post-menopausal women (60–65 years). The agonist-induced aggregation response did not differ between phases of the menstrual cycle or OC use. The results suggest that estradiol and/or progesterone affect spontaneous aggregation since it was found to be lowest in the mid-luteal phase. Spontaneous aggregation was significantly lower in women on OCs than in both men and women without OCs. Our findings indicate that fertile age is associated with higher aggregation response capacity of the platelets, possibly to prevent excessive bleeding during menstruation, but this response capacity is not altered during the menstrual cycle or by use of OCs.  相似文献   
55.
56.
57.
58.
59.
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia.  相似文献   
60.
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