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   5417625篇
  免费   413245篇
  国内免费   15638篇
耳鼻咽喉   77212篇
儿科学   174442篇
妇产科学   145267篇
基础医学   803420篇
口腔科学   151838篇
临床医学   501149篇
内科学   990692篇
皮肤病学   127979篇
神经病学   446757篇
特种医学   209002篇
外国民族医学   1148篇
外科学   813162篇
综合类   147516篇
现状与发展   24篇
一般理论   3029篇
预防医学   451561篇
眼科学   130189篇
药学   387700篇
  28篇
中国医学   13962篇
肿瘤学   270431篇
  2021年   57748篇
  2019年   60074篇
  2018年   78407篇
  2017年   60008篇
  2016年   66663篇
  2015年   78496篇
  2014年   113055篇
  2013年   178980篇
  2012年   159717篇
  2011年   171196篇
  2010年   137475篇
  2009年   134829篇
  2008年   155786篇
  2007年   168073篇
  2006年   174592篇
  2005年   168412篇
  2004年   168200篇
  2003年   157395篇
  2002年   146041篇
  2001年   215271篇
  2000年   212977篇
  1999年   189627篇
  1998年   77967篇
  1997年   71773篇
  1996年   69926篇
  1995年   65231篇
  1994年   59158篇
  1993年   54721篇
  1992年   140219篇
  1991年   135371篇
  1990年   131001篇
  1989年   127601篇
  1988年   117639篇
  1987年   115321篇
  1986年   108929篇
  1985年   105966篇
  1984年   84555篇
  1983年   74332篇
  1982年   53746篇
  1981年   49689篇
  1980年   46554篇
  1979年   75150篇
  1978年   58001篇
  1977年   50558篇
  1976年   47238篇
  1975年   48898篇
  1974年   55298篇
  1973年   52911篇
  1972年   49726篇
  1971年   46471篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
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   
992.
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   
993.
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   
994.
995.
996.
997.
998.
999.
1000.
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