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   1694638篇
  免费   136194篇
  国内免费   29592篇
耳鼻咽喉   19586篇
儿科学   48352篇
妇产科学   40441篇
基础医学   236615篇
口腔科学   41755篇
临床医学   181061篇
内科学   306298篇
皮肤病学   30308篇
神经病学   129268篇
特种医学   61601篇
外国民族医学   590篇
外科学   215589篇
综合类   97635篇
现状与发展   86篇
一般理论   489篇
预防医学   141299篇
眼科学   39318篇
药学   138216篇
  436篇
中国医学   27332篇
肿瘤学   104149篇
  2022年   18795篇
  2021年   28962篇
  2020年   21170篇
  2019年   23146篇
  2018年   28187篇
  2017年   23733篇
  2016年   23726篇
  2015年   31651篇
  2014年   41327篇
  2013年   50642篇
  2012年   71739篇
  2011年   77826篇
  2010年   48065篇
  2009年   42001篇
  2008年   63401篇
  2007年   65409篇
  2006年   64635篇
  2005年   62273篇
  2004年   53816篇
  2003年   51330篇
  2002年   47974篇
  2001年   68514篇
  2000年   70005篇
  1999年   59986篇
  1998年   19646篇
  1997年   18179篇
  1996年   16977篇
  1995年   16078篇
  1994年   14695篇
  1993年   12876篇
  1992年   43706篇
  1991年   42629篇
  1990年   41008篇
  1989年   38681篇
  1988年   35680篇
  1987年   34675篇
  1986年   32943篇
  1985年   31194篇
  1984年   23327篇
  1983年   19812篇
  1982年   11855篇
  1979年   20921篇
  1978年   14874篇
  1977年   12104篇
  1976年   11901篇
  1975年   12130篇
  1974年   14828篇
  1973年   14496篇
  1972年   13381篇
  1971年   12433篇
排序方式: 共有10000条查询结果,搜索用时 20 毫秒
51.
安宁疗护可提高患者在生命终末阶段的生活质量,减轻患者和家属的身心痛苦。科学合理的安宁疗护准入标准可帮助医护人员识别出需要安宁疗护服务的患者,使其及时获得安宁疗护服务,因此明确安宁疗护的准入标准是推进安宁疗护发展的基础。本文就国内外安宁疗护准入标准的制定方法、具体内容及优缺点进行综述,以期为我国安宁疗护准入标准的构建提供参考。  相似文献   
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.
良性前列腺增生(BPH)是老年男性常见的泌尿系统疾病,其发病与前列腺慢性炎症之间存在显著相关。感染因子、尿液返流、代谢综合征、衰老过程和自身免疫应答在内的几种刺激,通过相应分子途径引起前列腺免疫细胞的组织定位和组成成分发生广泛改变,从而导致免疫系统失调,之后引发的组织损伤和缓慢愈合,导致了BPH发生和进展。本文通过总结良性前列腺增生与前列腺慢性炎症的相关性的临床研究结果,前列腺免疫细胞在病理生理机制层面与前两者之间的内在联系,以及抗炎药物对BPH-LUTS的干预作用,以其为BPH-LUTS的药物研发提供参考。  相似文献   
59.
60.
通过病案举例,介绍大承气汤在中医脑病治疗中的使用技巧,说明大承气汤可以运用于出血性中风头痛、癫痫、失眠等多种脑病的治疗,疗效显著。大承气汤具有通腑泄热、祛邪外出的作用。对于六经辨证属阳明腑实证者,无论病种,皆可用大承气汤加味化裁。  相似文献   
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