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   11285篇
  免费   1432篇
  国内免费   33篇
耳鼻咽喉   128篇
儿科学   353篇
妇产科学   969篇
基础医学   1083篇
口腔科学   127篇
临床医学   3651篇
内科学   1622篇
皮肤病学   140篇
神经病学   874篇
特种医学   215篇
外科学   877篇
综合类   64篇
一般理论   10篇
预防医学   1146篇
眼科学   157篇
药学   496篇
中国医学   33篇
肿瘤学   805篇
  2024年   24篇
  2023年   234篇
  2022年   111篇
  2021年   255篇
  2020年   279篇
  2019年   220篇
  2018年   356篇
  2017年   356篇
  2016年   459篇
  2015年   419篇
  2014年   566篇
  2013年   688篇
  2012年   675篇
  2011年   733篇
  2010年   516篇
  2009年   657篇
  2008年   675篇
  2007年   628篇
  2006年   582篇
  2005年   518篇
  2004年   552篇
  2003年   524篇
  2002年   454篇
  2001年   147篇
  2000年   64篇
  1999年   162篇
  1998年   203篇
  1997年   188篇
  1996年   163篇
  1995年   164篇
  1994年   133篇
  1993年   109篇
  1992年   87篇
  1991年   90篇
  1990年   92篇
  1989年   62篇
  1988年   45篇
  1987年   40篇
  1986年   34篇
  1985年   59篇
  1984年   45篇
  1983年   43篇
  1982年   42篇
  1981年   40篇
  1980年   21篇
  1979年   19篇
  1978年   29篇
  1976年   21篇
  1973年   20篇
  1972年   20篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
The purpose of this study was to determine the effects of unilateral versus bilateral subthalamic nucleus (STN) stimulation on quantitative measures of walking and reaching in Parkinson's disease (PD). We used kinematic measures and the Unified Parkinson's Disease Rating Scale (UPDRS) motor subscale (subscale III) to evaluate the movement of 6 people with PD who had bilateral STN stimulators implanted for at least 6 months and withheld their anti-parkinson medication for at least 8 hours. Subjects were studied with both stimulators off, one on, and both on. Kinematic data were collected as subjects walked, reached to a target, and were rated using the UPDRS motor subscale. STN stimulation improved walking speed and stride length, with the greatest benefit from bilateral stimulation. Reaching speed was improved by unilateral STN stimulation alone, with no additive effect of bilateral stimulation. UPDRS motor subscale ratings paralleled the kinematic findings. STN stimulation did not restore PD subjects' movements to the level of age-matched controls. Overall, these results provide further evidence that the basal ganglia pathways involved in control of walking and reaching may be distinct. We speculate that basal ganglia may influence walking through bilateral pedunculopontine projections and reaching through ipsilateral thalamocortical projections. Our findings also suggest that maximal improvement of walking requires bilateral rather than unilateral STN stimulation.  相似文献   
33.
TOPIC: Psychological impact of adoption and resulting core issues for adopted children. PURPOSE: To raise awareness of the psychological impact of adoption. SOURCES: Published literature and personal observations. CONCLUSIONS: Adoption raises unique issues and challenges for the child and adoptive parents. Resolving the issues of adoption is a lifelong process. Through an awareness of the issues inherent in adoption, nurses and parents can use strategies that will enhance children's self-esteem and decrease their emotional vulnerability. Search terms: Adoption, intervention, loss, self-esteem, strategies  相似文献   
34.
35.
36.
37.
38.
Chlamydia trachomatis is the most prevalent sexually transmitted microbial infection in the United States. The CDC estimates that 3 million people are infected annually, with approximately 50% of infected men and 75% of infected women having few or no recognized symptoms. C. trachomatis is frequently transferred from mother to infant, and the maternal-infant transfer of this disease may have negative consequences for the newborn, such as prematurity, pneumonia, and conjunctivitis. Ocular prophylaxis with silver nitrate and or antibiotics is ineffective in preventing neonatal chlamydial conjunctivitis. By increasing awareness of the potential adverse consequences, initiating screening and treatment of pregnant women, and advocating for newborn assessment and treatment, nurses can enhance the quality of care for mothers and their infants.  相似文献   
39.
40.
This paper describes a response directed stress management intervention (SMI) in the form of a Jungian based preference awareness education (PAE). It uses the Insights System of personality types to increase awareness of behaviour and communication preferences of self and different others. Eighteen self‐recruited academic employees participated for 7 weeks and received feedback about work preferences and personality type. The aim was to reduce perceptions of stress and interpersonal stress and to increase feelings of job satisfaction and interpersonal satisfaction. The data were analysed using two‐tailed t‐tests. No significant findings were observed for the total sample after training, however, interesting results were found for certain sub‐sample groups. Extravert‐thinking types, reported decreased stress levels (p > 0.018), and participants suffering high stress/interpersonal stress pre‐PAE, reported decreased stress levels (p > 0.010–0.018). Participants suffering low job/interpersonal satisfaction pre‐PAE, reported increased job satisfaction (p > 0.015–0.016). These results suggest that individuals who report high levels of stress and dissatisfaction are most likely to benefit from this type of intervention. Future PAE research might: (a) use pilot studies to meet the intervention preferences of employees that are reluctant to participate in SMIs; (b) include a wait‐list control group; use: (c) a follow up education/measures; (d) and organizational level (stressor directed) SMIs at the same time as response directed initiatives. Copyright © 2005 John Wiley & Sons, Ltd.  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