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   2499749篇
  免费   231466篇
  国内免费   12619篇
耳鼻咽喉   34395篇
儿科学   78753篇
妇产科学   62489篇
基础医学   425207篇
口腔科学   66354篇
临床医学   223507篇
内科学   419760篇
皮肤病学   75030篇
神经病学   223164篇
特种医学   99022篇
外国民族医学   26篇
外科学   398419篇
综合类   81824篇
现状与发展   23篇
一般理论   2001篇
预防医学   213945篇
眼科学   56015篇
药学   167277篇
  20篇
中国医学   7853篇
肿瘤学   108750篇
  2022年   18989篇
  2021年   54213篇
  2020年   34607篇
  2019年   57475篇
  2018年   68745篇
  2017年   51891篇
  2016年   57205篇
  2015年   72018篇
  2014年   106057篇
  2013年   170980篇
  2012年   66030篇
  2011年   61654篇
  2010年   109001篇
  2009年   115762篇
  2008年   49385篇
  2007年   48768篇
  2006年   61198篇
  2005年   57082篇
  2004年   59641篇
  2003年   51283篇
  2002年   41452篇
  2001年   52301篇
  2000年   43354篇
  1999年   53791篇
  1998年   59690篇
  1997年   59025篇
  1996年   56616篇
  1995年   52246篇
  1994年   46423篇
  1993年   43564篇
  1992年   34528篇
  1991年   32149篇
  1990年   29568篇
  1989年   30121篇
  1988年   28192篇
  1987年   27464篇
  1986年   26170篇
  1985年   27674篇
  1984年   30732篇
  1983年   29718篇
  1982年   35608篇
  1981年   34120篇
  1980年   32260篇
  1979年   23003篇
  1978年   24466篇
  1977年   23553篇
  1976年   21310篇
  1975年   18823篇
  1974年   17329篇
  1973年   16583篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
951.
Pediatric dermatology is one of the smallest subspecialties, and expanding the availability of care is of great interest. Teledermatology has been proposed as a way to expand access and improve care delivery, but no current assessment of pediatric teledermatology exists. The objective of the current study was to assess usage and perspectives on pediatric teledermatology. Surveys were distributed electronically to all 226 board‐certified U.S. pediatric dermatologists; 44% (100/226) responded. Nearly all respondents (89%) have experience with teledermatology. Formal teledermatology reimbursement success rates have increased to 35%. Respondents were positive about teledermatology's present and future prospects, and 41% want to use teledermatology more often, although they viewed teledermatology as somewhat inferior to in‐person care regarding accuracy of diagnosis and appropriation of management plans. Significant differences were found between formal teledermatology users and nonusers in salary structure, practice environment, sex, and region. Substantial increases in pediatric teledermatology have occurred in the last 5 to 10 years, and there remains cause for optimism for teledermatology's future. Concerns about diagnostic confidence and care quality indicate that teledermatology may be best for care of patients with characteristic clinical presentations or management of patients with established diagnoses.  相似文献   
952.
We present the case of 7‐year‐old African American girl with loose anagen syndrome. Although this is a common cause of hair loss in Caucasian children, and there have been reports of cases occurring in dark‐skinned children of North African and Middle Eastern descent, to our knowledge there have been no cases reported in black children of sub‐Saharan African ancestry. We present this case to broaden the differential diagnosis of hair loss in African Americans.  相似文献   
953.
954.
955.
956.
957.
958.
959.
Background  Machine learning (ML) has captured the attention of many clinicians who may not have formal training in this area but are otherwise increasingly exposed to ML literature that may be relevant to their clinical specialties. ML papers that follow an outcomes-based research format can be assessed using clinical research appraisal frameworks such as PICO (Population, Intervention, Comparison, Outcome). However, the PICO frameworks strain when applied to ML papers that create new ML models, which are akin to diagnostic tests. There is a need for a new framework to help assess such papers. Objective  We propose a new framework to help clinicians systematically read and evaluate medical ML papers whose aim is to create a new ML model: ML-PICO (Machine Learning, Population, Identification, Crosscheck, Outcomes). We describe how the ML-PICO framework can be applied toward appraising literature describing ML models for health care. Conclusion  The relevance of ML to practitioners of clinical medicine is steadily increasing with a growing body of literature. Therefore, it is increasingly important for clinicians to be familiar with how to assess and best utilize these tools. In this paper we have described a practical framework on how to read ML papers that create a new ML model (or diagnostic test): ML-PICO. We hope that this can be used by clinicians to better evaluate the quality and utility of ML papers.  相似文献   
960.
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