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   18874篇
  免费   1872篇
  国内免费   290篇
耳鼻咽喉   87篇
儿科学   404篇
妇产科学   319篇
基础医学   1296篇
口腔科学   703篇
临床医学   3921篇
内科学   1822篇
皮肤病学   228篇
神经病学   1289篇
特种医学   328篇
外国民族医学   1篇
外科学   1247篇
综合类   2377篇
现状与发展   1篇
一般理论   4篇
预防医学   4319篇
眼科学   236篇
药学   1013篇
  51篇
中国医学   599篇
肿瘤学   791篇
  2024年   67篇
  2023年   400篇
  2022年   562篇
  2021年   862篇
  2020年   925篇
  2019年   778篇
  2018年   679篇
  2017年   777篇
  2016年   748篇
  2015年   735篇
  2014年   1308篇
  2013年   1677篇
  2012年   1195篇
  2011年   1246篇
  2010年   1031篇
  2009年   969篇
  2008年   962篇
  2007年   953篇
  2006年   842篇
  2005年   668篇
  2004年   518篇
  2003年   417篇
  2002年   385篇
  2001年   304篇
  2000年   247篇
  1999年   196篇
  1998年   187篇
  1997年   206篇
  1996年   153篇
  1995年   108篇
  1994年   146篇
  1993年   117篇
  1992年   101篇
  1991年   84篇
  1990年   73篇
  1989年   64篇
  1988年   64篇
  1987年   40篇
  1986年   36篇
  1985年   40篇
  1984年   18篇
  1983年   17篇
  1982年   18篇
  1981年   27篇
  1980年   13篇
  1979年   18篇
  1978年   20篇
  1977年   16篇
  1976年   6篇
  1975年   7篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
难治性便秘综合治疗及影响因素的评价   总被引:1,自引:0,他引:1  
目的评价综合治疗对难治性便秘的疗效及影响因素。方法将84例难治性便秘分为非重叠组和重叠组。应用个体化综合治疗4周,观察便秘症状评分变化及总有效率,分析IC患者的重叠症状和心理障碍状态对疗效的影响。结果(1)84例便秘患者中,重叠组和非重叠组分别占40.5%和59.5%。(2)重叠组和非重叠组的总有效率分别为50.0%和78.0%(P<0.05)。(3)对37例IC患者的心理测试调查显示,59.4%(22/37)有心理障碍状态,重叠组和非重叠组伴有心理障碍状态对治疗的总有效率分别为4.8%和31.5%(P<0.05)。结论适合个体化的综合治疗使多数难治性便秘缓解症状,但伴有重叠症状,尤其心理障碍状态则影响疗效。  相似文献   
32.
Described conceptual and methodological issues that arise inthe design and analysis of data from studies of the impact ofparental health problems on children. Researchers should considerhow the functional effects, duration, and type of exposure ofparental health problems affect children's psychological experience.Multiple pathways (e.g., parental modeling, family socializationpractices, and genetic factors) that affect the transmissionof psychological and/or health risk to children need to be considered.Important methodological issues in this area of research includesample selection and bias, confounding factors, and limitedassessment of family influences. Future work should identifyfactors that enhance child and family resilience to the effectsof parental health problems. Studies are also needed to developand test interventions to reduce the psychological morbidityassociated with parental health problems.  相似文献   
33.
Matcha, a type of green tea, has a higher amino acid content than other types of tea. We previously examined the ability of matcha to improve cognitive function in older adults and determined that continuous matcha intake improves attention and executive function. This study aimed to compare the effects of matcha and caffeine and clarify the differences between these effects. The study was registered at the University Hospital Medical Information Network (UMIN000036578). The effect of single and continuous intake was compared, and the usefulness of continuous intake was evaluated under the stress condition. The Uchida–Kraepelin test (UKT) was used to induce mild acute stress, and the Cognitrax was used to evaluate cognitive function. A single dose of caffeine improved attentional function during or after stress loading. The reduced reaction time in the Cognitrax, observed following a single dose of matcha, was likely due to caffeine. The matcha group showed an increase in the amount of work after continuous intake, whereas the caffeine group only showed an increase in the amount of work for the UKT after a single dose. Ingesting matcha with caffeine improves both attention and work performance when suffering from psychological stress compared with caffeine alone.  相似文献   
34.
35.
36.
This paper investigates the relationship between social participation and subjective health. Using individual-level data from the British Household Panel Survey, we show that being an active member of a social or sport organisation increases self-rated physical and psychological health. For men, the benefits of social interaction work primarily via physical pathways, while women report a more psychosocial channel. We separate the main results by occupation and document some heterogeneity. Manual workers find more physical and psychological relief via social involvement, whereas non-manual workers are more likely to take relief from sport participation. Interestingly, as the number of associations in which the individual is active increases, the incremental increase in social benefits diminishes. Our findings point to the importance of promoting social and sport activities in health communication and policy making.  相似文献   
37.
38.
铁路运输业职工心理紧张特点   总被引:11,自引:1,他引:11  
采用紧张性生活事件量表及症状自评量表(SCL-90),对铁路运输职业中火车司机213名、列车员205名及调度员138名职工进行了调查。结果提示火车司机的环境噪音污染问题、列车员的学习问题,调度员的人际关系、家庭、婚恋问题的年心理紧张均值,显著高于中国常模。发现家庭主要成员患急重病是火车司机和列车员的高强高频事件;本人生活习惯改变是三组共有的中强高频事件;不安心本职工作,工作中遇到困难是火车司机、列车员的中强高频事件。结果还发现调度员所承受的年心理压力最高为21.015,火车司机次之为19.042,两组显著高于中国常模,列车员最低,为11.902.同时还发现火车司机心理健康调查表中总苦恼水平最高,与另两组差异非常显著。  相似文献   
39.
This study examined the association between positive and negative aspects of spouse responses and psychological adjustment among 15S individuals with cancer. Two contextual variables, gender and disease-related functional impairment, were taken into account when examining the association between spouse responses and patient psychological distress and well-being. Results indicated that negative aspects of close relationships played a comparatively stronger role than positive aspects in their associations with both psychological distress and well-being. For negative spouse responses, patient gender did not moderate the effects of these responses upon psychological outcomes. For positive aspects of spouse support, both gender and functional disability moderated the association between spouse support and psychological outcomes. These findings are integrated with the general literature on positive and negative aspects of close relationships. Implications for clinical interventions are also discussed.  相似文献   
40.
Liaison with support personnel is important in the management of workers with occupational skin disease (OSD). This study shows that there are many areas of concern regarding the knowledge and understanding of OSD in these groups. There needs to be a comprehensive education programme concerning OSD within the working community and support personnel. Dermatologists need to simplify their "language' in the reporting of OSD. Insurers need to take a more sympathetic attitude towards the partially fit worker. Rehabilitation personnel must become more familiar with OSD.  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