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   4320568篇
  免费   347841篇
  国内免费   14057篇
耳鼻咽喉   59855篇
儿科学   138044篇
妇产科学   112657篇
基础医学   665789篇
口腔科学   115814篇
临床医学   393785篇
内科学   781319篇
皮肤病学   107504篇
神经病学   360734篇
特种医学   167205篇
外国民族医学   512篇
外科学   663398篇
综合类   121262篇
现状与发展   23篇
一般理论   2782篇
预防医学   361662篇
眼科学   102342篇
药学   302974篇
  26篇
中国医学   11535篇
肿瘤学   213244篇
  2021年   57128篇
  2020年   36330篇
  2019年   59688篇
  2018年   75477篇
  2017年   57309篇
  2016年   63525篇
  2015年   76417篇
  2014年   111383篇
  2013年   177255篇
  2012年   131076篇
  2011年   137953篇
  2010年   129135篇
  2009年   129344篇
  2008年   123072篇
  2007年   131467篇
  2006年   139688篇
  2005年   134820篇
  2004年   134549篇
  2003年   124371篇
  2002年   113019篇
  2001年   150324篇
  2000年   145053篇
  1999年   134894篇
  1998年   70736篇
  1997年   66715篇
  1996年   64818篇
  1995年   60033篇
  1994年   54105篇
  1993年   50330篇
  1992年   96355篇
  1991年   92881篇
  1990年   89278篇
  1989年   87062篇
  1988年   80256篇
  1987年   78762篇
  1986年   74085篇
  1985年   73229篇
  1984年   61931篇
  1983年   55662篇
  1982年   46269篇
  1981年   43359篇
  1980年   40712篇
  1979年   53253篇
  1978年   44187篇
  1977年   39004篇
  1976年   36388篇
  1975年   36373篇
  1974年   39525篇
  1973年   37742篇
  1972年   35359篇
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
991.
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   
992.
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   
993.
994.
995.
996.
997.
998.
999.
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   
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