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   4285111篇
  免费   362223篇
  国内免费   15311篇
耳鼻咽喉   61155篇
儿科学   133392篇
妇产科学   112148篇
基础医学   657591篇
口腔科学   118909篇
临床医学   389551篇
内科学   778593篇
皮肤病学   103421篇
神经病学   368119篇
特种医学   171284篇
外国民族医学   912篇
外科学   655033篇
综合类   126581篇
现状与发展   23篇
一般理论   2605篇
预防医学   361990篇
眼科学   100646篇
药学   303255篇
  23篇
中国医学   11385篇
肿瘤学   206029篇
  2021年   56007篇
  2020年   35664篇
  2019年   58890篇
  2018年   73605篇
  2017年   55819篇
  2016年   62210篇
  2015年   75477篇
  2014年   110382篇
  2013年   175867篇
  2012年   119364篇
  2011年   122540篇
  2010年   123594篇
  2009年   126623篇
  2008年   109373篇
  2007年   116033篇
  2006年   125406篇
  2005年   120587篇
  2004年   121370篇
  2003年   112035篇
  2002年   102522篇
  2001年   154440篇
  2000年   150541篇
  1999年   139625篇
  1998年   71407篇
  1997年   67862篇
  1996年   65724篇
  1995年   61591篇
  1994年   55653篇
  1993年   51681篇
  1992年   103637篇
  1991年   99006篇
  1990年   94121篇
  1989年   91723篇
  1988年   85349篇
  1987年   83805篇
  1986年   79487篇
  1985年   77920篇
  1984年   65966篇
  1983年   58873篇
  1982年   48155篇
  1981年   44907篇
  1980年   42182篇
  1979年   57830篇
  1978年   47045篇
  1977年   41601篇
  1976年   38658篇
  1975年   37852篇
  1974年   42421篇
  1973年   40562篇
  1972年   38019篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
971.
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   
972.
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   
973.
974.
975.
976.
977.
978.
979.
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   
980.
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