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   3829631篇
  免费   325542篇
  国内免费   15275篇
耳鼻咽喉   52257篇
儿科学   121403篇
妇产科学   98807篇
基础医学   593462篇
口腔科学   103253篇
临床医学   352389篇
内科学   688170篇
皮肤病学   102758篇
神经病学   324323篇
特种医学   149458篇
外国民族医学   262篇
外科学   598474篇
综合类   114274篇
现状与发展   91篇
一般理论   2415篇
预防医学   312184篇
眼科学   91008篇
药学   262525篇
  23篇
中国医学   11439篇
肿瘤学   191473篇
  2021年   56647篇
  2020年   37770篇
  2019年   59257篇
  2018年   75962篇
  2017年   58362篇
  2016年   64527篇
  2015年   78157篇
  2014年   115097篇
  2013年   180497篇
  2012年   108101篇
  2011年   110189篇
  2010年   125525篇
  2009年   129594篇
  2008年   96696篇
  2007年   100763篇
  2006年   110995篇
  2005年   105000篇
  2004年   106194篇
  2003年   95788篇
  2002年   85137篇
  2001年   137379篇
  2000年   130540篇
  1999年   123010篇
  1998年   70126篇
  1997年   66507篇
  1996年   63884篇
  1995年   59364篇
  1994年   53063篇
  1993年   49296篇
  1992年   85381篇
  1991年   81404篇
  1990年   76995篇
  1989年   75479篇
  1988年   69344篇
  1987年   67473篇
  1986年   63838篇
  1985年   62978篇
  1984年   55033篇
  1983年   49699篇
  1982年   43745篇
  1981年   41090篇
  1980年   38536篇
  1979年   44909篇
  1978年   38305篇
  1977年   34995篇
  1976年   32032篇
  1975年   30840篇
  1974年   32541篇
  1973年   31236篇
  1972年   29096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