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   2829篇
  免费   229篇
  国内免费   6篇
耳鼻咽喉   32篇
儿科学   79篇
妇产科学   58篇
基础医学   389篇
口腔科学   36篇
临床医学   403篇
内科学   516篇
皮肤病学   31篇
神经病学   198篇
特种医学   90篇
外科学   343篇
综合类   81篇
一般理论   4篇
预防医学   374篇
眼科学   18篇
药学   169篇
中国医学   4篇
肿瘤学   239篇
  2023年   31篇
  2022年   28篇
  2021年   89篇
  2020年   62篇
  2019年   72篇
  2018年   73篇
  2017年   77篇
  2016年   71篇
  2015年   91篇
  2014年   99篇
  2013年   179篇
  2012年   221篇
  2011年   212篇
  2010年   121篇
  2009年   116篇
  2008年   174篇
  2007年   167篇
  2006年   161篇
  2005年   150篇
  2004年   152篇
  2003年   142篇
  2002年   133篇
  2001年   31篇
  2000年   28篇
  1999年   35篇
  1998年   14篇
  1997年   25篇
  1996年   26篇
  1995年   17篇
  1994年   18篇
  1993年   11篇
  1992年   17篇
  1991年   18篇
  1990年   14篇
  1989年   11篇
  1988年   15篇
  1987年   7篇
  1986年   12篇
  1985年   16篇
  1984年   17篇
  1983年   11篇
  1982年   8篇
  1981年   6篇
  1980年   5篇
  1979年   6篇
  1976年   5篇
  1973年   10篇
  1972年   11篇
  1970年   9篇
  1969年   5篇
排序方式: 共有3064条查询结果,搜索用时 15 毫秒
1.
ABSTRACT

Introduction

Individuals with autism spectrum disorder (ASD) and intellectual disability (ID) seem to be at increased risk for post-traumatic stress disorder (PTSD), but knowledge is sparse regarding its identification in this population. Previous research indicates that certain symptoms of PTSD may be more easily recognized, and that identifying reexperiencing and avoidance is particularly challenging.  相似文献   
2.
3.
Celiac Disease   总被引:1,自引:0,他引:1  
  相似文献   
4.
5.
Objective: To evaluate the effects of a new timing strategy of band adjustment on the short-term outcome of obese women operated with adjustable silicone gastric banding. Subjects: The outcome of 30 women without binge-eating disorder operated with laparoscopic adjustable silicone gastric banding with a wider intraoperatory band calibration (LAP-BAND) was compared to that of 30 body mass index-matched women without binge-eating disorder previously operated with adjustable silicone gastric banding (ASGB) applied by laparotomy with the usual intraoperatory band calibration. The patients were evaluated 3, 6 and 12 months after surgery. Measurements: (1) weight loss; (2) total daily energy intake; (3) percent as liquid, soft or solid food; (4) vomiting frequency; (5) rate of postoperative percutaneous band adjustments; (6) rate of band-related complications. Results: Both the weight loss and the daily energy intake did not differ between patients with LAP-BAND and patients with ASGB. After surgery, the patients with LAP-BAND ate more solid food and less liquid food than the patients with ASGB. Vomiting frequency was higher in patients with ASGB than in patients with LAP-BAND. The total number of percutaneous band adjustments was higher in women with LAP-BAND than in women with ASGB. Band inflation because of weight stabilization was performed in six (20.0%) women with ASGB and in 19 (63.3%) women with LAP-BAND. Neostoma stenosis occurred in one women with ASGB, but in none of the women with LAP-BAND. One patient with LAP-BAND presented band slippage. Conclusions: The wider intraoperatory band calibration performed in patients with LAP-BAND did not reduce the short-term efficacy of adjustable silicone gastric banding. This new timing strategy of band adjustment required more postoperative percutaneous band inflations, but it improved the eating pattern of the patients (low vomiting frequency and high intake of solid food).  相似文献   
6.
7.
A young patient developed Hodgkin's disease 11 years after surgical, chemotherapeutic and radiation treatment for stage IIIA embryonal carcinoma of the testis. The importance is stressed of establishing a tissue diagnosis when there is an unexpected course of the disease.  相似文献   
8.
Background: Kuzmak's gastric silicone banding technique is the least invasive operation for morbid obesity. The purpose of this study was to analyze the complications of this approach. Methods: Between September 1992 and March 1996, 185 patients underwent laparoscopic gastroplasty by the adjustable silicone band technique. A minimally invasive procedure using five trocars was performed. Results: In 11 patients exposure of the hiatus was impeded because of hypertrophy of the left liver lobe which led to conversion in eight patients and abortion of the procedure in three other patients. Anatomical complications: We observed two gastric perforations and one band slippage at the early stage, one infection and three rotations of the access port. Functional complications: There were eight (4%) cases of irreversible total food intolerance resulting in pouch dilation and eight cases (4%) of esophagitis. One fatality on the 45th day in a patient with a Prader-Willi syndrome. Conclusion: The most disturbing complications of gastric banding technique are gastric perforation and pouch dilation. Their incidence may be reduced by improving the technique and by considering pitfalls of the procedure. Received: 28 May 1996/Accepted: 25 July 1996  相似文献   
9.
10.
BACKGROUND: Residual blood flow around thrombus prior to treatment predicts success of coronary thrombolysis. The authors aimed to correlate the presence of residual flow signals in the middle cerebral artery (MCA) with completeness of recanalization after intravenous tissue plasminogen activator (TPA). METHODS: The authors studied consecutive patients treated with intravenous TPA therapy who had a proximal MCA occlusion on pretreatment transcranial Doppler (TCD). Patients were continuously monitored for 2 hours after TPA bolus. Absent residual flow signals correspond to the thrombolysis in brain ischemia (TIBI) 0 grade, and the presence of residual flow signals was determined as TIBI 1-3 flow grades. Complete recanalization was defined as flow improvement to TIBI grades 4-5. RESULTS: Seventy-five patients with a proximal MCA occlusion had median pre-bolus NIHSS 16 (85% with > or = 10 points). TPA bolus was given at 141 +/- 56 minutes (median 120 minutes). Complete recanalization was observed in 25 (33%), partial in 23 (31%), and no early recanalization was seen in 27 (36%) patients within 2 hours after TPA bolus. Only 19% with absent residual flow signals (TIBI grade 0, n = 26) on pretreatment TCD had complete early recanalization. If pretreatment TCD showed the presence of any residual flow (TIBI 1-3, n = 49), 41% had complete recanalization within 2 hours of TPA bolus (P = .03). CONCLUSIONS: Patients with detectable residual flow signals before IV TPA bolus are twice as likely to have early complete recanalization. Those with no detectable residual flow signals have less than 20% chance for complete early recanalization with intravenous TPA and may be candidates for intra-arterial therapies.  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