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   14441篇
  免费   1374篇
  国内免费   24篇
耳鼻咽喉   135篇
儿科学   499篇
妇产科学   490篇
基础医学   1915篇
口腔科学   127篇
临床医学   2312篇
内科学   2384篇
皮肤病学   207篇
神经病学   1505篇
特种医学   218篇
外科学   1448篇
综合类   250篇
一般理论   27篇
预防医学   2060篇
眼科学   159篇
药学   906篇
中国医学   11篇
肿瘤学   1186篇
  2023年   115篇
  2022年   110篇
  2021年   419篇
  2020年   297篇
  2019年   505篇
  2018年   558篇
  2017年   411篇
  2016年   444篇
  2015年   464篇
  2014年   639篇
  2013年   864篇
  2012年   1269篇
  2011年   1348篇
  2010年   677篇
  2009年   603篇
  2008年   1016篇
  2007年   1028篇
  2006年   1042篇
  2005年   1041篇
  2004年   777篇
  2003年   688篇
  2002年   613篇
  2001年   94篇
  2000年   91篇
  1999年   78篇
  1998年   84篇
  1997年   59篇
  1996年   43篇
  1995年   46篇
  1994年   49篇
  1993年   37篇
  1992年   25篇
  1991年   20篇
  1990年   27篇
  1989年   26篇
  1988年   16篇
  1987年   18篇
  1986年   13篇
  1985年   15篇
  1984年   17篇
  1982年   11篇
  1981年   10篇
  1980年   17篇
  1979年   11篇
  1978年   10篇
  1974年   8篇
  1972年   12篇
  1971年   10篇
  1970年   7篇
  1969年   7篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
The coronavirus 2019 pandemic has affected almost every aspect of health care delivery in the United States, and the emergency medicine system has been hit particularly hard while dealing with this public health crisis. In an unprecedented time in our history, medical systems and clinicians have been asked to be creative, flexible, and innovative, all while continuing to uphold the important standards in the US health care system. To continue providing quality services to patients during this extraordinary time, care providers, organizations, administrators, and insurers have needed to alter longstanding models and procedures to respond to the dynamics of a pandemic. The Emergency Medicine Treatment and Active Labor Act of 1986, or EMTALA, is 1 example of where these alterations have allowed health care facilities and clinicians to continue their work of caring for patients while protecting both the patients and the clinicians themselves from infectious exposures at the same time.  相似文献   
3.
4.
In 2014, the Emergency Nutrition Network published a report on the relationship between wasting and stunting. We aim to review evidence generated since that review to better understand the implications for improving child nutrition, health and survival. We conducted a systematic review following PRISMA guidelines, registered with PROSPERO. We identified search terms that describe wasting and stunting and the relationship between the two. We included studies related to children under five from low- and middle-income countries that assessed both ponderal growth/wasting and linear growth/stunting and the association between the two. We included 45 studies. The review found the peak incidence of both wasting and stunting is between birth and 3 months. There is a strong association between the two conditions whereby episodes of wasting contribute to stunting and, to a lesser extent, stunting leads to wasting. Children with multiple anthropometric deficits, including concurrent stunting and wasting, have the highest risk of near-term mortality when compared with children with any one deficit alone. Furthermore, evidence suggests that the use of mid-upper-arm circumference combined with weight-for-age Z score might effectively identify children at most risk of near-term mortality. Wasting and stunting, driven by common factors, frequently occur in the same child, either simultaneously or at different moments through their life course. Evidence of a process of accumulation of nutritional deficits and increased risk of mortality over a child's life demonstrates the pressing need for integrated policy, financing and programmatic approaches to the prevention and treatment of child malnutrition.  相似文献   
5.
Abstract

Purpose: We aimed to evaluate the construct validity of the Eating Assessment Tool (EAT-10) by determining its dimensionality, rating scale integrity, item-person match, precision and relationship with the degree of airway invasion and functional oral intake.

Methods: We conducted a retrospective analysis of patients’ EAT-10 scores. We used the Rasch rating scale model. We investigated correlations between the EAT-10 and scores on the Penetration-Aspiration Scale (PAS) and Functional Oral Intake Scale (FOIS).

Results: The median score of the EAT-10 from 127 patients was 16 of 40 (range 0–40). Confirmatory factor analysis supported unidimensionality. The 5-point rating scale categories met published criteria. Two items misfit the Rasch model and two other items displayed differential item functioning. Rasch person reliability was 0.79. Our patient cohort was divided into three person-strata. Correlations between the EAT-10 and the PAS and FOIS were weak to moderate in strength (respectively: r?=?0.26, p?=?0.0036; r?=??0.27, p?=?0.0027).

Conclusions: Our analyses identified deficits in the construct validity of the EAT-10 suggestive of a need to improve the EAT-10 to support its frequent use in clinical practice and research.
  • Implications for Rehabilitation
  • Swallowing disorders are associated with severe complications, such as pneumonia and malnutrition, and impose both social and psychological burdens on patients.

  • The Eating Assessment Tool is a self-report instrument developed to estimate initial dysphagia severity and monitor change in patient-reported dysphagia symptoms as a response to treatment.

  • This study shows that the Eating Assessment Tool has deficits in its construct validity and a need to improve the instrument to support its frequent use in clinical practice and research.

  相似文献   
6.
7.
8.
Research has identified many benefits of participating in online social support forums; however, the potential negative impacts of these communities have rarely been examined. This study explored the negative impacts of low quality (i.e., low person-centered) and insufficient (i.e., under-benefitted) emotional support on online support seekers. Health stigma and perceived support availability were also examined as mediating and moderating variables, respectively, in the model. An online survey of addiction support forum users (N = 321) was conducted. Results showed that for participants with low health stigma, low person-centered support decreased health self-efficacy through reducing perceived online emotional support availability, but under-benefitted support did not impact them. For those with high health stigma, low person-centered emotional support had positive effects on health self-efficacy through increasing perceived support availability, whereas under-benefitted support reduced health self-efficacy through decreasing perceived support availability. Importantly, a considerable proportion of participants (44.86%) reported under-benefitted emotional support. These findings suggest support forum participation can have negative impacts, but not all participants are adversely impacted equally. Instead, moderating variables, such as health stigma, can play an important role. Implications for future research and health care practitioners are discussed.  相似文献   
9.
10.
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