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   2675920篇
  免费   240325篇
  国内免费   12777篇
耳鼻咽喉   36818篇
儿科学   85649篇
妇产科学   67608篇
基础医学   448770篇
口腔科学   72198篇
临床医学   238344篇
内科学   454313篇
皮肤病学   79365篇
神经病学   239414篇
特种医学   105845篇
外国民族医学   58篇
外科学   422904篇
综合类   83562篇
现状与发展   23篇
一般理论   2057篇
预防医学   224420篇
眼科学   60242篇
药学   179898篇
  19篇
中国医学   8171篇
肿瘤学   119344篇
  2022年   19172篇
  2021年   55021篇
  2020年   35357篇
  2019年   58310篇
  2018年   70619篇
  2017年   53502篇
  2016年   59244篇
  2015年   73322篇
  2014年   107864篇
  2013年   174012篇
  2012年   74187篇
  2011年   71165篇
  2010年   112185篇
  2009年   118198篇
  2008年   58579篇
  2007年   58865篇
  2006年   70644篇
  2005年   66740篇
  2004年   68864篇
  2003年   60740篇
  2002年   50821篇
  2001年   62263篇
  2000年   54255篇
  1999年   61086篇
  1998年   60717篇
  1997年   59709篇
  1996年   57312篇
  1995年   52894篇
  1994年   47048篇
  1993年   44103篇
  1992年   38271篇
  1991年   35733篇
  1990年   33184篇
  1989年   33460篇
  1988年   31246篇
  1987年   30376篇
  1986年   28942篇
  1985年   30251篇
  1984年   32627篇
  1983年   31175篇
  1982年   36298篇
  1981年   34739篇
  1980年   32851篇
  1979年   24783篇
  1978年   25656篇
  1977年   24491篇
  1976年   22120篇
  1975年   19887篇
  1974年   18512篇
  1973年   17671篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
961.
We report a case of dichorionic, diamniotic twins who developed similar erythematous, annular, erosive plaques in the inguinal folds in the first few weeks of life that were refractory to topical antifungals and oral antibiotics. The twins were found to have high transaminase levels, antinuclear antibody positivity, and anti‐SSS/Ro) and anti‐SSB/La autoantibodies. The rash resolved without scarring by 7 months of age with the use of low‐potency topical corticosteroids. We suggest that physicians consider neonatal lupus erythematosus in neonates with atypical eruptions occurring in sun‐protected skin.  相似文献   
962.
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   
963.
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   
964.
965.
966.
967.
968.
969.
970.
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   
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