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   2014篇
  免费   143篇
  国内免费   2篇
耳鼻咽喉   21篇
儿科学   81篇
妇产科学   38篇
基础医学   266篇
口腔科学   41篇
临床医学   204篇
内科学   499篇
皮肤病学   108篇
神经病学   70篇
特种医学   74篇
外科学   254篇
综合类   10篇
一般理论   1篇
预防医学   182篇
眼科学   21篇
药学   82篇
肿瘤学   207篇
  2023年   17篇
  2022年   22篇
  2021年   44篇
  2020年   31篇
  2019年   46篇
  2018年   51篇
  2017年   34篇
  2016年   55篇
  2015年   57篇
  2014年   76篇
  2013年   70篇
  2012年   125篇
  2011年   117篇
  2010年   60篇
  2009年   57篇
  2008年   90篇
  2007年   100篇
  2006年   87篇
  2005年   80篇
  2004年   80篇
  2003年   79篇
  2002年   74篇
  2001年   66篇
  2000年   84篇
  1999年   48篇
  1998年   13篇
  1997年   12篇
  1996年   14篇
  1995年   12篇
  1994年   11篇
  1993年   8篇
  1992年   31篇
  1991年   24篇
  1990年   27篇
  1989年   26篇
  1988年   31篇
  1987年   21篇
  1986年   28篇
  1985年   27篇
  1984年   23篇
  1983年   26篇
  1982年   18篇
  1981年   10篇
  1980年   9篇
  1979年   17篇
  1978年   9篇
  1972年   9篇
  1971年   7篇
  1967年   7篇
  1933年   8篇
排序方式: 共有2159条查询结果,搜索用时 31 毫秒
31.
Journal of Clinical Immunology - A Correction to this paper has been published: https://doi.org/10.1007/s10875-021-01030-6  相似文献   
32.
33.
34.
Endotracheal intubation has been associated with a threefold higher incidence of laryngopharyngeal complaints following anesthesia in comparison to laryngeal mask airway. Such complaints, including hoarseness and sore throat, have been reported in up to 90 % of patients within 24 h of extubation. The purpose of this study was to determine which preoperatively documented clinical and anatomic parameters are predictive of laryngo-pharyngeal trauma resulting from elective endotracheal intubation. Fifty-three patients undergoing ENT procedures requiring general anesthesia with endotracheal intubation were recruited. Pre and postoperative laryngostroboscopic examination was performed and findings correlated to preoperative clinical and anatomic parameters. Readily assessed anatomic parameters including height (>180 cm) and weight (>80 kg) correlated significantly to the Eckerbom grade of intubation-associated acute laryngeal injury (rs = 0.374; p = 0.006 and rs = 0.278; p = 0.044, respectively). The mandibular protrusion test also correlated significantly to the Eckerbom grade (rs = 0.462, p = 0.001) while the upper-lip-bite test showed significant correlation to impaired vocal fold oscillation (rs = 0.288, p = 0.036), with injury prediction sensitivities of 37.5 and 39.4 %, respectively. No parameters correlated to subjective complaints (n = 5, 9.2 %). This study provides suggestions on how to improve the classification of intubation-associated laryngeal injuries as well as providing the basis for larger clinical trials in other surgical subspecialties.  相似文献   
35.
36.
37.
38.
Digestive Diseases and Sciences - Non-responsive celiac disease (NRCD) has many aetiologies, including gluten exposure. Budesonide may be used for refractory celiac disease (RCD) and celiac crisis....  相似文献   
39.
Maximal hemodynamic and ventilatory responses using cycle and treadmill ergometer were compared in 52 asymptomatic patients with angiographically proved coronary artery disease. Moreover, test sensitivity with respect to ST-segment depression and typical angina pectoris were compared between exercise modes used. Exercise tests were performed on different days in randomized order. In 42 patients, exercise-induced myocardial ischemia, expressed as a fraction of left ventricular circumference, was assessed by thallium-201 scintigraphy. The main finding of this study was a significantly higher maximal oxygen uptake (1.87 +/- 0.4 vs 2.2 +/- 0.5 liters/min; p less than 0.001), heart rate (148 +/- 19 vs 158 +/- 18 beats/min; p less than 0.001) and rate-pressure product (28.3 +/- 5 x 10(3) vs 30.7 +/- 5 x 10(3); p less than 0.001) during treadmill walking than during cycling. Therefore, stress-induced myocardial ischemia was significantly more extensive after treadmill walking (31 +/- 37 degrees vs 45 +/- 40 degrees; p less than 0.001). Moreover, there were significantly more patients with signs of myocardial ischemia (ST-segment depression or typical angina pectoris, or both) during treadmill than during cycle ergometry (35 vs 25 patients; p less than 0.05). However, lactate levels measured at peak exercise (4.07 +/- 2.0 vs 4.38 +/- 1.9 mmol/liter) and 3 minutes into the recovery period (5.60 +/- 2.2 vs 5.80 +/- 2.2 mmol/liter) were comparable between both methods, indicating no significant difference in anaerobic energy production. These findings suggest that walking on a treadmill represents an exercise method with a greater ability than cycling to detect coronary artery disease.  相似文献   
40.
The VATER/VACTERL association describes the combination of congenital anomalies including vertebral defects, anorectal malformations, cardiac defects, tracheoesophageal fistula with or without esophageal atresia, renal malformations, and limb defects. As mutations in ciliary genes were observed in diseases related to VATER/VACTERL, we performed targeted resequencing of 25 ciliary candidate genes as well as disease‐associated genes (FOXF1, HOXD13, PTEN, ZIC3) in 123 patients with VATER/VACTERL or VATER/VACTERL‐like phenotype. We detected no biallelic mutation in any of the 25 ciliary candidate genes; however, identified an identical, probably disease‐causing ZIC3 missense mutation (p.Gly17Cys) in four patients and a FOXF1 de novo mutation (p.Gly220Cys) in a further patient. In situ hybridization analyses in mouse embryos between E9.5 and E14.5 revealed Zic3 expression in limb and prevertebral structures, and Foxf1 expression in esophageal, tracheal, vertebral, anal, and genital tubercle tissues, hence VATER/VACTERL organ systems. These data provide strong evidence that mutations in ZIC3 or FOXF1 contribute to VATER/VACTERL.  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