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   4187篇
  免费   243篇
  国内免费   25篇
耳鼻咽喉   32篇
儿科学   92篇
妇产科学   78篇
基础医学   620篇
口腔科学   136篇
临床医学   261篇
内科学   1108篇
皮肤病学   149篇
神经病学   390篇
特种医学   203篇
外科学   528篇
综合类   26篇
预防医学   363篇
眼科学   83篇
药学   180篇
中国医学   13篇
肿瘤学   193篇
  2024年   3篇
  2023年   30篇
  2022年   57篇
  2021年   146篇
  2020年   81篇
  2019年   114篇
  2018年   124篇
  2017年   84篇
  2016年   102篇
  2015年   135篇
  2014年   178篇
  2013年   199篇
  2012年   306篇
  2011年   315篇
  2010年   186篇
  2009年   153篇
  2008年   285篇
  2007年   315篇
  2006年   307篇
  2005年   246篇
  2004年   252篇
  2003年   222篇
  2002年   187篇
  2001年   48篇
  2000年   48篇
  1999年   33篇
  1998年   47篇
  1997年   20篇
  1996年   18篇
  1995年   13篇
  1994年   15篇
  1993年   7篇
  1992年   17篇
  1991年   24篇
  1990年   12篇
  1989年   14篇
  1988年   14篇
  1987年   7篇
  1986年   8篇
  1985年   8篇
  1984年   11篇
  1983年   8篇
  1982年   11篇
  1981年   6篇
  1980年   3篇
  1977年   3篇
  1976年   7篇
  1973年   8篇
  1969年   4篇
  1963年   2篇
排序方式: 共有4455条查询结果,搜索用时 421 毫秒
1.
2.
3.
4.
Background and aimsDespite using sensor-augmented pump therapy (SAPT) with predictive low-glucose management (PLGM), hypoglycemia is still an issue in patients with type 1 Diabetes (T1D). Our aim was to determine factors associated with clinically significant hypoglycemia (<54 mg/dl) in persons with T1D treated with PLGM-SAPT.Methodology: This is a multicentric prospective real-life study performed in Colombia, Chile and Spain. Patients with T1D treated with PLGM-SAPT, using sensor ≥70% of time, were included. Data regarding pump and sensor use patterns and carbohydrate intake from 28 consecutive days were collected. A bivariate and multivariate Poisson regression analysis was carried out, to evaluate the association between the number of events of <54 mg/dl with the clinical variables and patterns of sensor and pump use.Results188 subjects were included (41 ± 13.8 years-old, 23 ± 12 years disease duration, A1c 7.2% ± 0.9). The median of events <54 mg/dl was four events/patient/month (IQR 1–10), 77% of these events occurred during day time. Multivariate analysis showed that the number of events of hypoglycemia were higher in patients with previous severe hypoglycemia (IRR1.38; 95% CI 1.19–1.61; p < 0.001), high glycemic variability defined as Coefficient of Variation (CV%) > 36% (IRR 2.09; 95%CI 1.79–2.45; p < 0.001) and hypoglycemia unawareness. A protector effect was identified for adequate sensor calibration (IRR 0.77; 95%CI 0.66–0.90; p:0.001), and the use of bolus wizard >60% (IRR 0.74; 95%CI 0.58–0.95; p:0.017).ConclusionIn spite of using advanced SAPT, clinically significant hypoglycemia is still a non-negligible risk. Only the identification and intervention of modifiable factors could help to prevent and reduce hypoglycemia in clinical practice.  相似文献   
5.
6.
Background and study aimsThe COVID-19 outbreak has reorganized surgical team conditions regarding endoscopy. The number of interventions has been reduced, the number of healthcare professionals must be limited, and both the patients and physicians are more protected than ever.Patients and MethodsIn the highest peak of contagion in Colombia, endoscopy, colonoscopy, and esophagogastroduodenoscopy were performed using a low-cost disposable device. A total of 1388 procedures were performed. Every patient was assessed for symptoms via a telephone call, at the health center, and after the procedure, following specific attention routes.ResultsAfter procedure follow-up, no positive cases of COVID-19 were noted.ConclusionThe methodology reduced the risk of infection during the COVID-19 pandemic.  相似文献   
7.
8.
This paper presents our initial experience utilizing a new technique which allows CT and MR image fusion in patients with skull base lesions. Eleven patients with a variety of skull base lesions underwent CT and MR imaging prior to surgery. Both sets of images were coregistered using customized software. The CT and MR data sets were then combined and viewed in a single interactive image formar using a high-speed graphic computing system. Image fusion allowed simultaneous visualization of the bony skull base anatomy (CT) and detailed soft tissue anatomy (MR) using a single image format. Combining both modalities was felt to provide a better assessment of the extent of lesions and improve understanding of their relationship to adjacent bony and neurovascular anatomy. Specifically, image fusion enhanced awareness of location of skill base lesions with respect to the cavernous sinuses. Gasserian ganglia, carotid arteries, and jugular foramina. For tumors arising within the internal auditory canal (IAC), fused images allowed better delineation of the lateral aspect of the lesion with respect to the fundus of the IAC. Thus, fusion of CT and MR studies provides a unique image format which has advantages over single modality display. We believe image fusion is beneficial for surgical planning and for treatment planning of complex skull base malignancies treated with radiotherapy.  相似文献   
9.
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