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   28122篇
  免费   2589篇
  国内免费   72篇
耳鼻咽喉   300篇
儿科学   1092篇
妇产科学   588篇
基础医学   3593篇
口腔科学   428篇
临床医学   3526篇
内科学   4778篇
皮肤病学   501篇
神经病学   2794篇
特种医学   850篇
外国民族医学   1篇
外科学   3976篇
综合类   634篇
一般理论   23篇
预防医学   3404篇
眼科学   431篇
药学   2078篇
中国医学   44篇
肿瘤学   1742篇
  2023年   211篇
  2022年   290篇
  2021年   788篇
  2020年   433篇
  2019年   751篇
  2018年   879篇
  2017年   614篇
  2016年   597篇
  2015年   681篇
  2014年   937篇
  2013年   1324篇
  2012年   1893篇
  2011年   1950篇
  2010年   1075篇
  2009年   946篇
  2008年   1518篇
  2007年   1533篇
  2006年   1460篇
  2005年   1441篇
  2004年   1290篇
  2003年   1229篇
  2002年   1176篇
  2001年   649篇
  2000年   580篇
  1999年   488篇
  1998年   248篇
  1997年   205篇
  1996年   237篇
  1995年   181篇
  1994年   183篇
  1993年   159篇
  1992年   357篇
  1991年   353篇
  1990年   372篇
  1989年   335篇
  1988年   276篇
  1987年   286篇
  1986年   226篇
  1985年   254篇
  1984年   216篇
  1983年   162篇
  1982年   140篇
  1981年   110篇
  1980年   125篇
  1979年   170篇
  1978年   148篇
  1977年   116篇
  1976年   104篇
  1974年   128篇
  1973年   110篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
991.
To meet increasing demand for home care, the role of personal support workers (PSWs) is shifting from providing primarily personal and supportive care to include care activities previously provided by regulated health professionals (RHPs). Much of the research examining this shift focuses on specialty programmes, with few studies investigating the daily care being provided by PSWs, frequency of care activities being provided by PSWs, and characteristics of the population receiving more complex tasks. Between January and April 2015, a review of 517 home‐care service user charts was undertaken in Ontario, Canada, to: (1) describe the range of tasks being performed by PSWs in home care, (2) identify tasks transferred by RHPs to PSWs, and (3) examine characteristics of service users receiving transferred care. Findings indicate that normally, PSWs provide personal and supportive care commensurate with their training. However, in approximately one quarter of care plans reviewed, PSWs also completed more complex care activities transferred to them by RHPs. Service users receiving transferred care were older and had higher levels of cognitive and functional impairment. Although there is potential for the expansion of home‐care services through increased utilisation of PSWs, healthcare leadership must ensure that the right provider is being utilised at the right time and in the right place to ensure safe and effective quality care. Thus, several actions are recommended: PSW core competencies be clearly articulated, processes used to transfer care activities from RHPs to PSWs be standardised and a team‐based approach to the delivery of home‐care services be considered. Utilisation of a team‐based model can help establish positive relationships among home‐care providers, provide increased support for PSWs, allow for easier scheduling of initial training and ensure regular reassessments of PSW competence among PSWs providing added skills.  相似文献   
992.
993.
Objective: To assess gender differences in the relationship between eating and weight loss attitudes (EWAs), and 30-day tobacco and alcohol use among adolescents, while controlling for potential confounds (age, country of birth, psychological distress, pubertal development, peer alcohol and tobacco use, and sexual activity). Methods: School students aged between 11 and 17 years (N = 10,273) from high schools in the State of Victoria (Australia) completed surveys in class under conditions of anonymity and confidentiality. Results: The interaction between EWAs and gender was significant for tobacco use but not for alcohol use, indicating that the effect of EWAs on tobacco use, but not alcohol use, vary by gender. Conclusions: Tobacco use was related to EWAs in adolescent females but not males, and this is consistent with the possibility that females use tobacco in an instrumental fashion to control weight. Implications and Contribution: Female adolescents high in eating and weight loss attitudes were more likely to engage in tobacco use. In contrast, eating and weight loss attitudes were not related to male tobacco use. These results point to the potential importance of developing gender-specific approaches towards addressing problematic behaviors in adolescent populations.  相似文献   
994.
995.
996.
997.
998.
Objectives Breastfeeding has short- and long-term health benefits for children and mothers, but US breastfeeding rates are suboptimal. Exposure to violence may contribute to these low rates, which vary by race/ethnicity. We studied: (1) whether patterns of violence exposure differ by race/ethnicity and (2) whether these patterns are associated with breastfeeding outcomes. Methods We conducted a secondary analysis of data drawn from self-report surveys completed by a convenience sample of low-income postpartum women (n?=?760) in upstate New York. Latent class analysis was used to identify groups of women with similar responses to seven violence measures, including childhood physical and/or sexual violence, experience of partner violence during or just after pregnancy (physical, emotional, verbal), and neighborhood violence (perceived or by ZIP code). Logistic regression and survival analysis were utilized to determine if classes were associated with breastfeeding initiation, duration, and exclusivity, controlling for demographics. Results Exposure to at least one form of violence was high in this sample (87%). We identified 4 classes defined by violence exposure (combining current and historical exposures). Violence exposure patterns differed between racial/ethnic groups, but patterns were inconsistently associated with breastfeeding plans or outcomes. For White women, history of violence exposure increased the likelihood of earlier breastfeeding cessation. By contrast, among Black women, history of violence exposure increased the likelihood of having a breastfeeding plan and initiating breastfeeding. Conclusions for Practice Some differences between violence exposure classes are likely due to the correlation between race/ethnicity and socioeconomic status in the community studied. Additional studies are warranted to better understand how exposure to violence is related to breastfeeding and how best to support women making decisions about intention, initiation, and duration of breastfeeding.  相似文献   
999.
1000.
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