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   1359445篇
  免费   104600篇
  国内免费   6390篇
耳鼻咽喉   16994篇
儿科学   43855篇
妇产科学   36651篇
基础医学   201214篇
口腔科学   36328篇
临床医学   133205篇
内科学   262133篇
皮肤病学   26595篇
神经病学   113158篇
特种医学   49119篇
外国民族医学   387篇
外科学   186689篇
综合类   33037篇
现状与发展   10篇
一般理论   464篇
预防医学   115907篇
眼科学   29665篇
药学   101484篇
  36篇
中国医学   4631篇
肿瘤学   78873篇
  2021年   12485篇
  2019年   12569篇
  2018年   17322篇
  2017年   13156篇
  2016年   14065篇
  2015年   16515篇
  2014年   22420篇
  2013年   33304篇
  2012年   46141篇
  2011年   49015篇
  2010年   28368篇
  2009年   25934篇
  2008年   44035篇
  2007年   46434篇
  2006年   46467篇
  2005年   45041篇
  2004年   42391篇
  2003年   40242篇
  2002年   39004篇
  2001年   61365篇
  2000年   63043篇
  1999年   52881篇
  1998年   15055篇
  1997年   13722篇
  1996年   13496篇
  1995年   12801篇
  1994年   11895篇
  1993年   11076篇
  1992年   41761篇
  1991年   40901篇
  1990年   39565篇
  1989年   37458篇
  1988年   34715篇
  1987年   33773篇
  1986年   32218篇
  1985年   30695篇
  1984年   23063篇
  1983年   19617篇
  1982年   11772篇
  1979年   20819篇
  1978年   14816篇
  1977年   12066篇
  1976年   11876篇
  1975年   12112篇
  1974年   14800篇
  1973年   14474篇
  1972年   13357篇
  1971年   12423篇
  1970年   11485篇
  1969年   10415篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
32.
33.
34.
35.
36.

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   
37.
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   
38.
39.
40.
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