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   4422275篇
  免费   380004篇
  国内免费   15736篇
耳鼻咽喉   62930篇
儿科学   137067篇
妇产科学   115168篇
基础医学   670805篇
口腔科学   123442篇
临床医学   412979篇
内科学   805033篇
皮肤病学   106612篇
神经病学   381625篇
特种医学   175251篇
外国民族医学   919篇
外科学   674805篇
综合类   128244篇
现状与发展   59篇
一般理论   2808篇
预防医学   378367篇
眼科学   105353篇
药学   310465篇
  27篇
中国医学   11578篇
肿瘤学   214478篇
  2021年   57849篇
  2020年   38344篇
  2019年   60403篇
  2018年   77849篇
  2017年   60423篇
  2016年   67015篇
  2015年   80163篇
  2014年   116320篇
  2013年   182611篇
  2012年   129083篇
  2011年   133432篇
  2010年   129283篇
  2009年   132257篇
  2008年   119410篇
  2007年   126533篇
  2006年   135869篇
  2005年   130618篇
  2004年   130672篇
  2003年   120826篇
  2002年   110724篇
  2001年   155514篇
  2000年   151334篇
  1999年   140653篇
  1998年   72679篇
  1997年   68849篇
  1996年   66573篇
  1995年   62238篇
  1994年   56162篇
  1993年   52135篇
  1992年   104037篇
  1991年   99332篇
  1990年   94414篇
  1989年   92006篇
  1988年   85606篇
  1987年   84082篇
  1986年   79755篇
  1985年   78176篇
  1984年   66235篇
  1983年   59110篇
  1982年   48406篇
  1981年   45128篇
  1980年   42381篇
  1979年   57979篇
  1978年   47197篇
  1977年   41720篇
  1976年   38784篇
  1975年   37953篇
  1974年   42528篇
  1973年   40663篇
  1972年   38123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