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   2581篇
  免费   209篇
  国内免费   3篇
耳鼻咽喉   32篇
儿科学   80篇
妇产科学   62篇
基础医学   359篇
口腔科学   30篇
临床医学   341篇
内科学   442篇
皮肤病学   30篇
神经病学   214篇
特种医学   31篇
外科学   292篇
综合类   80篇
预防医学   370篇
眼科学   18篇
药学   166篇
中国医学   4篇
肿瘤学   242篇
  2023年   26篇
  2022年   34篇
  2021年   81篇
  2020年   51篇
  2019年   65篇
  2018年   70篇
  2017年   69篇
  2016年   61篇
  2015年   80篇
  2014年   85篇
  2013年   163篇
  2012年   208篇
  2011年   190篇
  2010年   109篇
  2009年   109篇
  2008年   166篇
  2007年   152篇
  2006年   152篇
  2005年   143篇
  2004年   144篇
  2003年   134篇
  2002年   123篇
  2001年   26篇
  2000年   29篇
  1999年   30篇
  1998年   14篇
  1997年   23篇
  1996年   25篇
  1995年   17篇
  1994年   16篇
  1993年   12篇
  1992年   19篇
  1991年   15篇
  1990年   9篇
  1989年   8篇
  1988年   10篇
  1987年   6篇
  1986年   10篇
  1985年   11篇
  1984年   11篇
  1983年   6篇
  1982年   10篇
  1981年   5篇
  1980年   6篇
  1979年   7篇
  1978年   4篇
  1976年   4篇
  1974年   4篇
  1972年   5篇
  1969年   5篇
排序方式: 共有2793条查询结果,搜索用时 31 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.
Estrogen receptor (ER) and progesterone receptor (PR) contents were determined by biochemical (dextran charcoal-coated (DCC) assay) and immunohistochemical (ICA) methods in biopsies from 145 primary endometrial adenocarcinomas and those with eligible receptor measurements were analyzed with respect to correlations to cancer-specific survival in a multivariate analysis including histopathological characteristics. Median patient follow-up time was 67 months with 18 cancer deaths. The PR-DCC and ER-DCC values were dichotomized according to levels previously found by us to correspond to the best agreement between receptor status as determined by the DCC and ICA methods (130 fmol/mg cytosol protein for ER, 114 fmol/mg for PR). Using these thresholds, we found by multivariate analysis that “high” PR-DCC levels (>114 fmol/mg) correlated significantly (P= 0.004) with survival, independent of stage risk group (Ia + b vs Ic-IV). Patient age and histologic grade were prognostic factors in a univariate setting, but these parameters were eliminated in the multivariate model. While the PR-ICA scores also correlated significantly and independently with survival, the predictive effect of PR-ICA positivity alone could not be statistically evaluated due to the number of cases with eligible ICA values. However, we suggest that owing to a close correlation between DCC and ICA results, PR-ICA status may provide significant prognostic information when DCC measurements are not available.  相似文献   
7.
8.
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   
9.
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   
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