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   14432篇
  免费   806篇
  国内免费   75篇
耳鼻咽喉   145篇
儿科学   398篇
妇产科学   253篇
基础医学   1832篇
口腔科学   460篇
临床医学   1187篇
内科学   3220篇
皮肤病学   392篇
神经病学   1568篇
特种医学   579篇
外国民族医学   3篇
外科学   1955篇
综合类   130篇
一般理论   3篇
预防医学   774篇
眼科学   234篇
药学   1055篇
中国医学   29篇
肿瘤学   1096篇
  2023年   71篇
  2022年   158篇
  2021年   349篇
  2020年   187篇
  2019年   253篇
  2018年   292篇
  2017年   215篇
  2016年   264篇
  2015年   306篇
  2014年   421篇
  2013年   536篇
  2012年   878篇
  2011年   888篇
  2010年   518篇
  2009年   425篇
  2008年   781篇
  2007年   746篇
  2006年   741篇
  2005年   746篇
  2004年   671篇
  2003年   594篇
  2002年   543篇
  2001年   482篇
  2000年   492篇
  1999年   397篇
  1998年   146篇
  1997年   127篇
  1996年   133篇
  1995年   110篇
  1994年   126篇
  1993年   97篇
  1992年   301篇
  1991年   243篇
  1990年   232篇
  1989年   195篇
  1988年   163篇
  1987年   154篇
  1986年   162篇
  1985年   152篇
  1984年   112篇
  1983年   80篇
  1982年   51篇
  1981年   52篇
  1980年   44篇
  1979年   84篇
  1977年   47篇
  1974年   46篇
  1973年   49篇
  1972年   68篇
  1971年   49篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Six healthy male volunteers received aspirin (ASA) in a compressed (320 mg) and an enteric-coated (800 mg) formulation as single oral doses ten days apart. Ten plasma samples were obtained from each volunteer between 5 and 120 min after compressed ASA, and seven between 10 and 240 min after enteric-coated ASA. ASA was undetectable (less than 100 ng/ml) in plasma from three subjects receiving compressed ASA and two receiving the enteric-coated preparation. Plasma levels and kinetic parameters of salicylate were the same in subjects with undetectable and detectable ASA plasma levels. More than 98% inhibition of pre-drug serum TXB2 was noted in all samples collected one and four hours after either ASA preparation. TXB2 generation recovered on average by 3.5% at 24 hr with both preparations. Thus inhibition of platelet TXB2 generation occurred independently of the amount of ASA reaching the peripheral circulation. If this is due to inhibition of platelet function in the enterohepatic circulation followed by extensive first-pass deacetylation of ASA, vascular PGI2 synthesis could be spared. A better knowledge of the kinetic parameters of ASA for each of the formulations used in thrombosis prevention trials might help in solving the "aspirin dilemma".  相似文献   
92.
The relationship between bladder cancer and alcohol consumption was investigated in a case-control study conducted in 546 patients (453 males and 53 females) with diagnoses of papillary urothelial carcinoma during 1978–1982 at La Paz hospital (Madrid), and an equal number of controls matched for age, sex and date of admission to the hospital. The results showed that the risk of bladder cancer does not increase with the intake of beer, wine and spirit beverages. However, a high risk of bladder cancer was associated with consumption of wine mixed with gaseosa (a refreshment beverage consisiting of carbonated water plus artificial sweeteners).  相似文献   
93.
The importance of a "compression-mobilization" association in order to attain a correct therapeutical procedure is stressed. The authors then report the results of a study conducted on patients affected by varices to establish the efficacy of a treatment by means of elastic stockings with graduated compressive pressure and the efficacy of reflex-rheography as a noninvasive, economical and easy-to-use method for the assessment of the variations in venous return flow produced by the association of muscular activity and elastocompression.  相似文献   
94.

This article describes the process of integrating trauma-informed behavioral health practices into a pediatric primary care clinic serving low-income and minority families while facing barriers of financial, staffing, and time limitations common to many community healthcare clinics. By using an iterative approach to evaluate each step of the implementation process, the goal was to establish a feasible system in which primary care providers take the lead in addressing traumatic stress. This article describes (1) the process of implementing trauma-informed care into a pediatric primary care clinic, (2) the facilitators and challenges of implementation, and (3) the impact of this implementation process at patient, provider, and community levels. Given the importance of trauma-informed care, especially for families who lack access to quality care, the authors conceptualize this paper as a guide for others attempting to integrate best behavioral health practices into pediatric clinics while working with limited resources.

  相似文献   
95.
96.
BackgroundLymphatic disorders (LDs) are the most common minor complications after kidney transplantation (KT), with an incidence rate between 0.6% and 33.9%, which appears to be related to both surgical and medical factors. LDs mostly resolve spontaneously, but occasionally a surgical approach may be required.Materials and MethodsWe report our experience with 7 KT recipients who developed persistent lymphorrhea (>150 mL/24 h) between October 2017 and March 2019. All cases were treated as outpatients with parietal fistulectomy (PF). The fibrotic aponeurotic-cutaneous tract was thoroughly excised, and the residual aponeurotic defect was closed by watertight suturing. Serial abdominal ultrasounds (US) were carried out after the procedure.ResultsA small perirenal graft lymphocele of <2 cm was detected by US in all patients after 48 to 72 hours, without any evidence of either vascular or ureteral compression. During the subsequent scheduled US follow-up, lymphoceles did not increase in size, and additional interventions were not needed. Neither superficial nor deep surgical-site infections were recorded in such patients.ConclusionsPF was found to be a safe and effective minimally invasive approach for persistent lymphorrhea after KT. It could be easily performed with local anesthesia in a day surgery setting and did not require patient hospitalization.  相似文献   
97.
98.
99.
100.
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