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   3555787篇
  免费   299519篇
  国内免费   13538篇
耳鼻咽喉   48221篇
儿科学   112817篇
妇产科学   91964篇
基础医学   564528篇
口腔科学   95473篇
临床医学   326308篇
内科学   630263篇
皮肤病学   93004篇
神经病学   306377篇
特种医学   138260篇
外国民族医学   299篇
外科学   543025篇
综合类   104452篇
现状与发展   24篇
一般理论   2604篇
预防医学   304268篇
眼科学   82054篇
药学   244693篇
  24篇
中国医学   9571篇
肿瘤学   170615篇
  2021年   56323篇
  2020年   35893篇
  2019年   59214篇
  2018年   73136篇
  2017年   55398篇
  2016年   61050篇
  2015年   75006篇
  2014年   109781篇
  2013年   175595篇
  2012年   106352篇
  2011年   108387篇
  2010年   121216篇
  2009年   124211篇
  2008年   94011篇
  2007年   98669篇
  2006年   108036篇
  2005年   103801篇
  2004年   104574篇
  2003年   94619篇
  2002年   83779篇
  2001年   103173篇
  2000年   95721篇
  1999年   95850篇
  1998年   65221篇
  1997年   63104篇
  1996年   61170篇
  1995年   56523篇
  1994年   50785篇
  1993年   47404篇
  1992年   67869篇
  1991年   65053篇
  1990年   61685篇
  1989年   60858篇
  1988年   56699篇
  1987年   55478篇
  1986年   52896篇
  1985年   52484篇
  1984年   48418篇
  1983年   44561篇
  1982年   41953篇
  1981年   39668篇
  1980年   37377篇
  1979年   40822篇
  1978年   36418篇
  1977年   32961篇
  1976年   30246篇
  1975年   29109篇
  1974年   30606篇
  1973年   29715篇
  1972年   27891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