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   5457095篇
  免费   425030篇
  国内免费   16715篇
耳鼻咽喉   78238篇
儿科学   173100篇
妇产科学   145702篇
基础医学   805718篇
口腔科学   155650篇
临床医学   504831篇
内科学   997632篇
皮肤病学   125871篇
神经病学   456649篇
特种医学   213817篇
外国民族医学   1455篇
外科学   815900篇
综合类   153433篇
现状与发展   24篇
一般理论   3038篇
预防医学   459794篇
眼科学   130896篇
药学   393111篇
  28篇
中国医学   14113篇
肿瘤学   269840篇
  2021年   57262篇
  2019年   59714篇
  2018年   77430篇
  2017年   59435篇
  2016年   66260篇
  2015年   78176篇
  2014年   113016篇
  2013年   178911篇
  2012年   156154篇
  2011年   166455篇
  2010年   135282篇
  2009年   134127篇
  2008年   151765篇
  2007年   163633篇
  2006年   170198篇
  2005年   164338篇
  2004年   164643篇
  2003年   154126篇
  2002年   143600篇
  2001年   219558篇
  2000年   217970篇
  1999年   194086篇
  1998年   79256篇
  1997年   73104篇
  1996年   70929篇
  1995年   66584篇
  1994年   60584篇
  1993年   55954篇
  1992年   145365篇
  1991年   139883篇
  1990年   134590篇
  1989年   130650篇
  1988年   120925篇
  1987年   119006篇
  1986年   112577篇
  1985年   109425篇
  1984年   87371篇
  1983年   76690篇
  1982年   55192篇
  1981年   50946篇
  1980年   47678篇
  1979年   78476篇
  1978年   60142篇
  1977年   52367篇
  1976年   49027篇
  1975年   49972篇
  1974年   57581篇
  1973年   55236篇
  1972年   51999篇
  1971年   47952篇
排序方式: 共有10000条查询结果,搜索用时 15 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