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   2294945篇
  免费   171889篇
  国内免费   3352篇
耳鼻咽喉   32122篇
儿科学   77676篇
妇产科学   63475篇
基础医学   333674篇
口腔科学   63170篇
临床医学   208474篇
内科学   450164篇
皮肤病学   49733篇
神经病学   182198篇
特种医学   88301篇
外国民族医学   898篇
外科学   337845篇
综合类   49128篇
现状与发展   4篇
一般理论   890篇
预防医学   183436篇
眼科学   51791篇
药学   169639篇
  9篇
中国医学   4104篇
肿瘤学   123455篇
  2018年   23982篇
  2017年   18187篇
  2016年   19935篇
  2015年   22844篇
  2014年   31581篇
  2013年   48485篇
  2012年   66378篇
  2011年   70742篇
  2010年   41569篇
  2009年   39860篇
  2008年   67120篇
  2007年   71948篇
  2006年   71790篇
  2005年   70173篇
  2004年   68082篇
  2003年   65523篇
  2002年   64041篇
  2001年   104976篇
  2000年   108150篇
  1999年   91820篇
  1998年   25795篇
  1997年   23266篇
  1996年   23902篇
  1995年   22599篇
  1994年   21254篇
  1993年   19792篇
  1992年   73278篇
  1991年   71897篇
  1990年   69834篇
  1989年   67237篇
  1988年   62167篇
  1987年   61196篇
  1986年   57656篇
  1985年   55032篇
  1984年   41690篇
  1983年   35609篇
  1982年   20983篇
  1981年   19157篇
  1979年   38360篇
  1978年   27590篇
  1977年   23172篇
  1976年   21686篇
  1975年   23315篇
  1974年   27806篇
  1973年   27209篇
  1972年   25399篇
  1971年   23447篇
  1970年   22039篇
  1969年   20521篇
  1968年   18962篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
993.
We report the case of a patient infected with human immunodeficiency virus who presented with fever and a disseminated papulous eruption, diagnosed as cutaneous miliary tuberculosis. The diagnosis was made by histological examination of a skin biopsy, which showed numerous acid‐fast bacilli. A culture grown from a skin biopsy isolated a resistant Mycobacterium tuberculosis strain. The papules disappeared within a few days after starting treatment with pyrazinamide, isoniazid and moxifloxacin.  相似文献   
994.
995.
A case of untreated fusarial onychomycosis leading to serious consequences is reported. Fusarium solani is a widespread fungus and an occasional human pathogen. It usually invades rapidly in immunocompromised hosts, and often results in a poor outcome despite treatment. We report a woman with diabetes mellitus who had untreated fusarial infection of the nails, which developed into subcutaneous fusariosis, superinfected by bacteria, and then evolved into osteomyelitis that subsequently resulted in septic shock. Early management of mycotic nails in immunocompromised hosts is crucial to prevent life‐threatening disease.  相似文献   
996.
Background  Psoriasis is a chronic disease characterized by abnormal epidermal proliferation, inflammation and angiogenesis. It has been reported that vascular endothelial growth factor (VEGF) is overexpressed in lesional psoriatic skin and its serum levels are significantly elevated in patients with moderate to severe disease.
Objective  This study aims to evaluate the possible role of VEGF in the pathogenesis of psoriasis, and its significance as an indicator of disease severity and control.
Methods  Thirty patients with moderate to severe psoriasis and 10 healthy controls were subjected to baseline evaluation of VEGF. Patients were divided into three groups according to the received treatment: psoralen plus ultraviolet A (PUVA) thrice weekly (group 1), acitretin 50 mg daily (group 2), and combined PUVA twice weekly and acitretin 25 mg daily (group 3).Treatment continued for 16 weeks or up to clinical cure. Every patient was subjected to severity evaluation by Psoriasis Area and Severity Index (PASI) and measurement of serum VEGF before and after treatment.
Results  Mean serum levels of VEGF were significantly elevated in patients (327 ± 66.2 pg/mL) than control subjects (178 ± 83.4 pg/mL). A highly significant correlation was found between VEGF and PASI score, but not with other variables. The best clinical response, the least side-effects and the highest reduction of VEGF serum levels were achieved by the combined therapy.
Conclusion  The present study supported the proposed role of VEGF in the pathogenesis of psoriasis, and suggested that it could serve as a good indicator of disease severity and control.  相似文献   
997.
998.
Background/aim  Theoretical considerations support the combination of cryosurgery and topical imiquimod to treat basal cell carcinomas (BCC). The aim of the present study was to test the feasibility and efficacy of 'cryosurgery during continued imiquimod application' ('immunocryosurgery') to treat 'high-risk-for-recurrence' BCCs.
Methods  Thirteen patients with 21 biopsy-proven tumours (4 of 21 relapses after prior surgery) were included. After 2–5 weeks (median, 3) of daily 5% imiquimod cream application, the tumours were treated by liquid N2 cryosurgery (spray, two cycles, 10–20 s) and imiquimod was continued for additional 2–12 weeks (median, 4). The outcome after at least 18 months of follow-up (18–24 months) is currently reported.
Results  Nineteen of 21 tumours responded promptly to immunocryosurgery; two tumours required additional treatment cycles to clear. Thus, the clinical clearance rate was 100%. Only 1 of 21(5%) tumour relapsed after at least 18 months of follow-up (cumulative efficacy: 95%).
Conclusions  'Immunocryosurgery' is a promising non-surgical combination modality to treat 'high-risk-for-recurrence BCCs'. Initial evidence is suggestive of an at least additive effect of the two combined modalities. Further studies comparing immunocryosurgery directly with cryosurgery and imiquimod monotherapies will confirm the reported results.  相似文献   
999.
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