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   8096篇
  免费   377篇
  国内免费   43篇
耳鼻咽喉   33篇
儿科学   142篇
妇产科学   159篇
基础医学   882篇
口腔科学   445篇
临床医学   484篇
内科学   1876篇
皮肤病学   334篇
神经病学   550篇
特种医学   386篇
外科学   1290篇
综合类   57篇
预防医学   238篇
眼科学   190篇
药学   565篇
中国医学   12篇
肿瘤学   873篇
  2023年   38篇
  2022年   80篇
  2021年   138篇
  2020年   67篇
  2019年   100篇
  2018年   150篇
  2017年   96篇
  2016年   112篇
  2015年   127篇
  2014年   176篇
  2013年   218篇
  2012年   311篇
  2011年   351篇
  2010年   202篇
  2009年   200篇
  2008年   373篇
  2007年   426篇
  2006年   387篇
  2005年   416篇
  2004年   373篇
  2003年   409篇
  2002年   390篇
  2001年   306篇
  2000年   304篇
  1999年   283篇
  1998年   102篇
  1997年   73篇
  1996年   91篇
  1995年   76篇
  1994年   67篇
  1993年   49篇
  1992年   181篇
  1991年   170篇
  1990年   176篇
  1989年   186篇
  1988年   160篇
  1987年   157篇
  1986年   104篇
  1985年   130篇
  1984年   91篇
  1983年   70篇
  1982年   37篇
  1981年   43篇
  1980年   26篇
  1979年   79篇
  1978年   40篇
  1977年   42篇
  1976年   26篇
  1975年   32篇
  1974年   54篇
排序方式: 共有8516条查询结果,搜索用时 312 毫秒
1.
Depigmented lesions may occur as postinflammatory sequelae of subacute cutaneous lupus erythematosus (SCLE), leading to great psychosocial impact. A 53‐year‐old male patient presented with post‐SCLE depigmented facial lesions after five years of disease stability. We proposed surgical treatment with melanocyte‐keratinocyte transplantation procedure (MKTP), and after five months the patient achieved 90% repigmentation, without Koebner phenomenon (KP). In theory, KP is a possible complication of MKTP procedure since the preparation of the receptor area involves the use of dermabrasion. In an attempt to avoid it, we suggest to maintain the treatment of the underlying disease and wait for a minimum period of disease stability before the procedure.  相似文献   
2.
3.
This study was designed to characterize a collection of 60 enteropathogenic Escherichia coli (EPEC) isolates from diarrheic feces of patients in the Ribeirão Preto metropolitan area regarding different phenotypic and molecular features. We examined antibiotic resistance profiles, occurrence of virulence factors‐encoding genes, intimin subtypes and the correlation of serotypes among typical (tEPEC) and atypical (aEPEC) EPEC isolates. The results demonstrated that atypical EPEC was more heterogeneous than typical EPEC concerning the characteristics investigated and 45.2% do not belong to classical EPEC serogroups. Intimin subtype β was the most frequent among the EPEC isolates (46.7%), being detected in both tEPEC and aEPEC. The majority of aEPEC isolates presented localized adherence‐like (LAL) pattern to HEp‐2 cells, although aEPEC isolates displaying diffuse adherence (DA) or non‐adherent were also detected. High prevalence of antimicrobial resistance was found for ampicillin, cephalothin, sulfonamide and tetracycline. In general, tEPEC isolates were more resistant to the antimicrobials tested than aEPEC isolates.  相似文献   
4.
5.
A new method for protecting intestinal anastomoses in patients at high risk of anastomotic dehiscence or fistula formation is described herein. This method involves raising a seromuscular flap on a pedicle from the stump of the intestine to be anastomosed. The anastomosis is performed, then covered with the seromuscular flap.  相似文献   
6.
H Sasaki  K Sudoh  K Hamada  T Hamada  K Tashiro 《Neurology》1987,37(7):1258-1262
We studied two patients with nonfamilial olivopontocerebellar atrophy with skeletal myoclonus. Palatal or skeletal myoclonus is probably not a coincidental finding but another manifestation of the underlying disease. In both cases, the myoclonus was suppressed by administration of trihexyphenidyl, indicating a cholinergic disorder.  相似文献   
7.
8.
Five patients undergoing orthotopic liver transplantation were investigated for changes in acid-base homeostasis secondary to large volume transfusions. All patients developed a transient acidemia during the operative period, followed by alkalemia which persisted into the early postoperative period. The patients received an estimated mean of 750 mEq of citrate, which appeared to cause metabolic alkalosis. The biochemical basis underlying the regulation of citrate metabolism that may have led to the timing, extent, and duration of the subsequent metabolic alkalosis is presented. Finally, the time course for the development of metabolic alkalosis may be a potentially sensitive indicator of early allograft function.  相似文献   
9.
A left ventricular rupture due to embolic myocardial infarction is extremely rare. A 72-year-old woman developed an acute embolic myocardial infarction and mitral regurgitation due to infective endocarditis. Two days after the infarction, a left ventricular free wall rupture occurred after transesophageal echo examination. She received an epicardial patch and mitral valve replacement. Perioperatively, an intra-aortic balloon pump and long-term antibiotics were used. The postoperative course was uneventful, and she is doing well 10 months after surgery.  相似文献   
10.
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