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   3920篇
  免费   255篇
  国内免费   17篇
耳鼻咽喉   21篇
儿科学   169篇
妇产科学   138篇
基础医学   464篇
口腔科学   84篇
临床医学   392篇
内科学   769篇
皮肤病学   49篇
神经病学   254篇
特种医学   486篇
外科学   461篇
综合类   89篇
一般理论   4篇
预防医学   421篇
眼科学   26篇
药学   183篇
  1篇
中国医学   1篇
肿瘤学   180篇
  2022年   23篇
  2021年   43篇
  2020年   21篇
  2019年   36篇
  2018年   43篇
  2017年   43篇
  2016年   49篇
  2015年   64篇
  2014年   92篇
  2013年   128篇
  2012年   144篇
  2011年   137篇
  2010年   103篇
  2009年   133篇
  2008年   139篇
  2007年   162篇
  2006年   157篇
  2005年   164篇
  2004年   150篇
  2003年   131篇
  2002年   125篇
  2001年   86篇
  2000年   76篇
  1999年   93篇
  1998年   98篇
  1997年   111篇
  1996年   105篇
  1995年   95篇
  1994年   62篇
  1993年   78篇
  1992年   62篇
  1991年   59篇
  1990年   57篇
  1989年   101篇
  1988年   79篇
  1987年   96篇
  1986年   94篇
  1985年   116篇
  1984年   66篇
  1983年   72篇
  1982年   42篇
  1981年   51篇
  1980年   58篇
  1979年   27篇
  1978年   46篇
  1977年   33篇
  1976年   41篇
  1975年   34篇
  1974年   18篇
  1969年   18篇
排序方式: 共有4192条查询结果,搜索用时 0 毫秒
71.
IntroductionBreast cancer is a global health problem with 2.09 million cases of breast cancer diagnosed worldwide in 2018. With an increase in breast cancer survival attention has now focussed on the impact treatment side effects can have on the quality of life for women during survivorship. The aim of the SuPPORT 4 All project is to develop a support bra for use during radiotherapy, that can reduce normal tissue toxicity (for women with larger breasts) and provide accuracy, dignity and modesty for all women. The first stage of the project involved a co-design process to understand the current patient experience where no support bra or modesty device is used.MethodA participatory co-design methodology was adopted. Workshops were held with patient representatives (n = 9) to seek understanding of experience during radiotherapy; a total of three workshops over 4 h. The workshops were audio recorded and framework analysis was adopted to identify key patient experiences.ResultsTwelve categories and twenty-six sub categories were identified specific to patient experience. Patient concerns focussed on information provision, Healthcare Practitioner (HCP) knowledge of breast lymphoedema, lack of choice, experiences of being naked, and feelings of disempowerment.ConclusionsA number of areas were identified that had negative effects on overall patient experience.Implications for practicePractitioners should consider patient dignity when configuring services to support patient needs regarding undressing, outside or inside the linear accelerator room. Additionally, practitioners should have an understanding of the impact permanent tattoos may have on some patients’ wellbeing and the impact that breast lymphoedema has on patient quality of life. Practitioners should also consider methods to encourage patient empowerment during radiotherapy; supporting patient self-monitoring of side-effects may be one way to facilitate this.  相似文献   
72.
73.
74.
75.
76.
77.
PURPOSE: To examine: (1) the relationship between parental monitoring and communication and adolescent risk involvement over time, including consideration of their potential interaction; and (2) the effect of consistent versus inconsistent monitoring and communication over time on adolescent risk behaviors. METHODS: Baseline and follow-up data were collected from 1999-2003. A total of 817 African-American adolescents and their parents were recruited from 35 low-income urban communities in Baltimore, MD. Perceived parental monitoring, parent-adolescent communication and seven risk behaviors were assessed. Logistic general estimating equation (GEE) models were performed to assess the dynamic association. RESULTS: Perceived parental monitoring had protective effects on concurrent adolescent risk involvement over two-year observation. The protective effect on girls' sexual abstinence increased significantly over time. Perceived problem communication was associated with increased risk of concurrent involvement in violent behaviors, but the effect did not change over time. For girls, the probability of engaging in sex increased greatly (from 0.3 to 0.6) for those who perceived problem communication, while it remained stable (about 0.4) for those perceiving less problem communication. CONCLUSIONS: The data confirm the protective effect of perceived parental monitoring on adolescent risk involvement. It also extends previous findings by showing the importance of consistent parental monitoring and communication.  相似文献   
78.
Synapses, circuits, and the ontogeny of learning   总被引:1,自引:0,他引:1  
This article summarizes the proceedings of a symposium organized by Mark Stanton and Pamela Hunt and presented at the annual meeting of the International Society for Developmental Psychobiology. The purpose of the symposium was to review recent advances in neurobiological and developmental studies of fear and eyeblink conditioning with the hope of discovering how neural circuitry might inform the ontogenetic analyses of learning and memory, and vice versa. The presentations were: (1) Multiple Brain Regions Contribute to the Acquisition of Pavlovian Fear by Michael S. Fanselow; (2) Expression of Learned Fear: Appropriate to Age of Training or Age of Testing by Rick Richardson; (3) Trying to Understand the Cerebellum Well Enough to Build One by Michael D. Mauk; and (4) The Ontogeny of Eyeblink Conditioning: Neural Mechanisms by John H. Freeman. Taken together, these presentations converge on the conclusions that (1) seemingly simple forms of associative learning are governed by multiple "engrams" and by temporally dynamic interactions among these engrams and other circuit elements and (2) developmental changes in these interactions determine when and how learning emerges during ontogeny.  相似文献   
79.
80.
Project Kealahou (PK) is a six-year, federally-funded program aimed at improving services and outcomes for Hawai‘i''s female youth who are at risk for running away, truancy, abuse, suicide, arrest and incarceration. PK builds upon two decades of sustained cross-agency efforts among the state''s mental health, juvenile justice, education, and child welfare systems to promote system-of-care (SOC) principles of community-based, individualized, culturally and linguistically competent, family driven, youth-guided, and evidence-based services. In addition, PK emphasizes trauma-informed and gender-responsive care in serving its target population of females ages 11–18 years who have experienced psychological trauma.Results from the first four years of the implementation of PK in the Department of Health''s (DOH) Child and Adolescent Mental Health Division (CAMHD) highlight the serious familial, socioeconomic, functional, and interpersonal challenges faced by the young women who receive services in Hawai‘i''s SOC. Despite the challenges faced by PK youth and their families, preliminary results of the evaluation of PK show significant improvements across multiple clinical and functional domains of service recipients. A financial analysis indicates that these outcomes were obtained with a minimal overall increase in costs when compared to standard care alone. Overall, these results suggest that PK may offer a cost effective way to improve access, care, and outcomes for at-risk youth and their families in Hawai‘i.  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