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   8723篇
  免费   347篇
  国内免费   79篇
耳鼻咽喉   333篇
儿科学   403篇
妇产科学   377篇
基础医学   551篇
口腔科学   333篇
临床医学   656篇
内科学   1906篇
皮肤病学   162篇
神经病学   639篇
特种医学   354篇
外科学   2032篇
综合类   156篇
一般理论   1篇
预防医学   134篇
眼科学   494篇
药学   330篇
中国医学   23篇
肿瘤学   265篇
  2024年   4篇
  2023年   35篇
  2022年   114篇
  2021年   185篇
  2020年   111篇
  2019年   176篇
  2018年   215篇
  2017年   192篇
  2016年   294篇
  2015年   382篇
  2014年   434篇
  2013年   516篇
  2012年   633篇
  2011年   709篇
  2010年   431篇
  2009年   373篇
  2008年   669篇
  2007年   722篇
  2006年   678篇
  2005年   620篇
  2004年   509篇
  2003年   416篇
  2002年   326篇
  2001年   50篇
  2000年   35篇
  1999年   46篇
  1998年   33篇
  1997年   21篇
  1996年   22篇
  1995年   17篇
  1994年   16篇
  1993年   12篇
  1992年   11篇
  1991年   9篇
  1990年   14篇
  1989年   8篇
  1988年   15篇
  1987年   9篇
  1986年   7篇
  1985年   16篇
  1984年   9篇
  1983年   8篇
  1982年   3篇
  1979年   5篇
  1978年   5篇
  1975年   4篇
  1974年   6篇
  1972年   2篇
  1969年   4篇
  1967年   3篇
排序方式: 共有9149条查询结果,搜索用时 15 毫秒
61.
Asprosin associated with insulin resistance is a newly discovered peptide hormone. The peptide promotes hepatic glucose production. Polycystic ovary syndrome (PCOS) is a metabolic disorder. Insulin resistance plays a vital role in the pathogenesis of the disease. The aim of this study was to discover the association between insulin resistance and asprosin in women with PCOS. We recruited 78 subjects with PCOS and 78 age-matched and body mass index (BMI)-matched controls into this cross-sectional study. Circulating asprosin levels were validated using ELISA method. We also determined metabolic and hormonal parameters of the involved subjects. We found that circulating asprosin levels were elevated in women with PCOS with respect to controls. Asprosin levels showed a positive correlation with insulin resistance, BMI, and free androgen index (FAI). Moreover, subjects with the highest tertile of asprosin levels represented increased odds of having PCOS as compared to those subjects with the lowest tertile asprosin levels. Increased asprosin levels resulted to high possibility of having PCOS risk associated with insulin resistance.  相似文献   
62.
Rocuronium is a non-depolarizing neuromuscular blocking agent which is associated with injection pain and induces withdrawal movement of the injected hand or arm or generalized movements of the body after intravenous injection. The aim of this randomized study was to compare the efficacy of pretreatment with oral dexketoprofen trometamol (Arvelles®; Group A) with placebo (Group P) without tourniquet to prevent the withdrawal response caused by rocuronium injection. The study cohort comprised 150 American Society of Anaesthesiologists class I–III patients aged 18–75 years who were scheduled to undergo elective surgery with general anesthesia. The patients response to rocuronium was graded using a 4-point scale [0 = no response; 1 = movement/withdrawal at the wrist only, 2 = movement/withdrawal involving the arm only (elbow/shoulder); 3 = generalized response]. The overall incidence of withdrawal movement after rocuronium injection was significantly lower in Group A (30.1 %) than in Group P (64.6 %) (p < 0.001). The incidence of score 0 withdrawal movements was higher in Group A (69.9 %) than in Group P (35.4 %), that of score 1 withdrawal movements was similar between groups (Group A 21.9 %; Group B 26.1 %) (p = 0.560) and that of score 2 withdrawal movements was lower in Group A (8.2 %) than in Group P (38.5 %) (p < 0.001). There were no score 3 withdrawal movements in either group (p > 0.05). These results demonstrate that the preemptive administration of dexketoprofen trometamol can attenuate the degree of withdrawal movements caused by the pain of the rocuronium injection.  相似文献   
63.
64.
An 83‐year‐old male patient presented to the outpatient clinic with complaint of swelling at right antecubital area. Ultrasonographic examination of the right upper extremity revealed a mass lesion within the right cephalic vein, which was consistent with thrombus. A computed tomography (CT) venography showed contrast enhancement in cephalic vein at distal arm and an aneurysmatic thrombus area displaying regular borders with a size of 28*30 mm; there was no contrast enhancement at more proximal levels at the cephalic vein.  相似文献   
65.
66.
67.
68.
69.
70.
INTRODUCTIONSymtomatic lumbar ligamantum flavum calcification is quite rare in the young age group.PRESENTATION OF CASEThe authors report a case of young adult with diagnosis of lumbar spinal stenosis, presenting with leg pain and neurological deficits. Computerized tomography (CT) scan and magnetic resonance (MR) imaging studies revealed ossification of the ligamantum flavum as the causative factor of the disease and the patient recovered completely after the decompressive operation.DISCUSSIONIt is emphasized that attention should be given to this rare etiological factor of lumbar spinal stenosis.CONCLUSIONComplete relief can be achieved with early and adequate surgery.  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