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   2182669篇
  免费   157760篇
  国内免费   4495篇
耳鼻咽喉   30776篇
儿科学   73518篇
妇产科学   62645篇
基础医学   318484篇
口腔科学   61452篇
临床医学   190745篇
内科学   421704篇
皮肤病学   48209篇
神经病学   173667篇
特种医学   86682篇
外国民族医学   673篇
外科学   332222篇
综合类   47228篇
现状与发展   1篇
一般理论   681篇
预防医学   163498篇
眼科学   50919篇
药学   162621篇
  4篇
中国医学   4334篇
肿瘤学   114861篇
  2018年   22375篇
  2017年   17189篇
  2016年   19925篇
  2015年   22654篇
  2014年   30444篇
  2013年   46193篇
  2012年   62863篇
  2011年   66618篇
  2010年   39763篇
  2009年   37029篇
  2008年   63640篇
  2007年   68340篇
  2006年   69481篇
  2005年   67615篇
  2004年   65419篇
  2003年   63566篇
  2002年   61995篇
  2001年   96849篇
  2000年   99125篇
  1999年   83845篇
  1998年   24127篇
  1997年   21565篇
  1996年   21544篇
  1995年   20466篇
  1994年   19269篇
  1993年   17899篇
  1992年   66945篇
  1991年   65878篇
  1990年   65021篇
  1989年   62905篇
  1988年   57997篇
  1987年   57465篇
  1986年   54341篇
  1985年   52176篇
  1984年   39191篇
  1983年   33588篇
  1982年   20235篇
  1981年   18053篇
  1979年   36958篇
  1978年   26349篇
  1977年   22624篇
  1976年   21410篇
  1975年   23198篇
  1974年   27507篇
  1973年   26540篇
  1972年   24901篇
  1971年   23266篇
  1970年   21603篇
  1969年   20505篇
  1968年   19207篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
Breast elastography has been available for more than 15 years but is not widely incorporated into clinical practice. Many publications report extremely high accuracy for various breast elastographic techniques. However, results in the literature are extremely variable. This variability is most likely due to variations in technique, a relatively steep learning curve, and variability in methods between vendors. This article describes our protocol for performing breast elastography using both strain elastography and shear wave elastography, which produces high sensitivity and specificity. Additionally, we will describe the most commonly known false-positive and false-negative lesions as well as how to detect them.  相似文献   
102.
103.
104.
105.
106.
IntroductionInterprofessional learning (IPL) is a vital aspect of training in radiation oncology professions, yet is rarely delivered to those professionals who work most closely together in clinical practice. Scenario-based learning using simulation facilities provides a unique opportunity to facilitate this learning and this project aimed to determine the impact and value of this initiative.MethodsSmall groups comprising post-graduate diploma pre-registration therapeutic radiographers, medical physics trainees and radiation oncology registrars were challenged with 4 plausible and challenging radiotherapy scenarios within an academic simulation centre. Pre- and post-event completion of the “Readiness for Interprofessional Learning Scale” measured impact and a Likert-style survey gathered feedback from participants.ResultsThe session increased participants' teamwork and collaboration skills as well as strengthening professional identities. Participants reported high levels of enjoyment related to collaborative working, communication and observing other professionals deploying their technical skills and specialist knowledge.ConclusionAlthough beneficial, simulated scenarios offering equal opportunities for engagement across the professions are challenging to plan and timetabling issues between the 3 groups present significant difficulties. The safe environment and unique opportunity for these groups to learn together was particularly well received and future oncology-specific simulated scenario sessions are planned with larger cohorts.Implications for practiceSimulated scenario training can be used to improve team working across the radiotherapy interprofessional team and may have wider use in other specialist interdisciplinary team development.  相似文献   
107.
A local pedicled vascularized bone flap can prevent the morbidity and cost of free bone flap surgery in small segmental bone defects or long cartilaginous defects of the head and neck. Such flaps can also be useful in patients who are high risk for surgery. The periosteal vascularity of the mandible can be used to design islanded facial artery-based bone flaps, which can be utilized to that extent. Two patients with a small segmental mandibulectomy defect and one patient with a long cricotracheal resection defect underwent reconstruction using three different designs of islanded facial artery osteomyomucosal/osseous flap (iFOMM). The patients had a minimum follow-up period of 18 months. All flaps were successful, with satisfactory healing and without any functional deficit or disease at last follow-up.  相似文献   
108.
109.
Graefe's Archive for Clinical and Experimental Ophthalmology - Retinal microvascular endothelial dysfunction is thought to be of importance in the development of ocular vascular diseases....  相似文献   
110.
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