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   8056篇
  免费   358篇
  国内免费   19篇
耳鼻咽喉   201篇
儿科学   167篇
妇产科学   122篇
基础医学   1671篇
口腔科学   171篇
临床医学   527篇
内科学   1229篇
皮肤病学   477篇
神经病学   802篇
特种医学   286篇
外科学   1092篇
综合类   54篇
一般理论   3篇
预防医学   379篇
眼科学   194篇
药学   597篇
中国医学   24篇
肿瘤学   437篇
  2022年   51篇
  2021年   96篇
  2020年   92篇
  2019年   92篇
  2018年   117篇
  2017年   99篇
  2016年   110篇
  2015年   143篇
  2014年   177篇
  2013年   212篇
  2012年   354篇
  2011年   396篇
  2010年   265篇
  2009年   231篇
  2008年   390篇
  2007年   419篇
  2006年   391篇
  2005年   411篇
  2004年   374篇
  2003年   345篇
  2002年   388篇
  2001年   82篇
  2000年   81篇
  1999年   100篇
  1998年   96篇
  1997年   104篇
  1996年   75篇
  1995年   58篇
  1994年   62篇
  1993年   50篇
  1992年   52篇
  1991年   40篇
  1989年   41篇
  1987年   41篇
  1985年   54篇
  1982年   46篇
  1976年   40篇
  1940年   44篇
  1939年   58篇
  1938年   54篇
  1937年   43篇
  1932年   48篇
  1930年   48篇
  1928年   58篇
  1927年   48篇
  1926年   49篇
  1925年   45篇
  1923年   41篇
  1922年   42篇
  1913年   49篇
排序方式: 共有8433条查询结果,搜索用时 343 毫秒
11.
12.
13.
14.
15.
16.
    
Ohne Zusammenfassung
Nouveaux livres
  相似文献   
17.
Ohne ZusammenfassungAusführlich: Zeitschr. f. d. ges. Neurol. u. Psychiatr. Bd. LXXVIII, H. 2/3.  相似文献   
18.
The aim of this prospective randomized study was to determine whether additional doxorubicin chemotherapy improves outcome in patients with hepatocellular carcinoma (HCCA) treated by liver transplantation. Stratification parameters were tumor stage (UICC I-IVa), gender, age 50 years, α-fetoprotein 20 ng/mL, cirrhosis and HbsAg status. For pre-operative chemotherapy doxorubicin (15 mg/m2) was given biweekly, intra-operative chemotherapy was a single dose administered before surgical manipulation. Post-operative chemotherapy from day 10 was as given preoperatively for a total dosage of 300 mg/m2. Outcome parameters were overall survival (OS) and disease-free survival. Of the 75 consecutive patients who received liver transplantation for treatment of HCCA, 62 patients were enrolled. Thirty-four patients were randomized in the chemotherapy group; 28 patients were in the control group and transplanted only. OS rates at 5 years were 38% in the chemotherapy group and 40% in the control group, disease-free survival rates at 5 years 43% and 53%, respectively. Tumor stage and vascular invasion were identified as independent risk factors for recurrence of disease. Doxorubicin chemotherapy did not improve organ survival and disease-free survival in patients undergoing liver transplantation for HCCA.  相似文献   
19.
This review tries to summarize the efforts over the past 20 years to construct a tissue-engineered trachea. After illustrating the main technical bottlenecks faced nowadays, we discuss what might be the solutions to these bottlenecks. You may find out why the focus in this research field shifts dramatically from the construction of a tubular cartilage tissue to reepithelialization and revascularization of the prosthesis. In the end we propose a novel concept of 'in vivo bioreactor', defined as the design of a perfusion system inside the scaffold, and explain its potential application in the construction of a tissue-engineered trachea.  相似文献   
20.
Medical records of 158 patients with bipolar depression were analysed for the incidence of a switch from depression to maniform states (mania and hypomania). Relation to psychopharmacological treatment was investigated. Thirty-nine (25%) patients of the total sample had switched to a maniform state during the treatment period in the hospital. Among that group the phenomenon occurred in 23 patients (15%) as a hypomania and in 16 patients (10%) as a mania. Patients with a switch were significantly more often treated with tricyclic antidepressants (TCA) than patients without switch (79.5% vs 51.3%). Mood stabilising medication might reduce the risk for switching, especially in patients treated with TCA; however, it seems not totally sufficient, since 59% of the switched patients received mood stabilisers. The switch phenomenon was not associated with sociodemographic or clinical data. Received: 23 September 1998 / Accepted: 28 September 1998  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