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   1282457篇
  免费   100241篇
  国内免费   2037篇
耳鼻咽喉   18464篇
儿科学   44422篇
妇产科学   35054篇
基础医学   183088篇
口腔科学   33671篇
临床医学   111824篇
内科学   259458篇
皮肤病学   28161篇
神经病学   101000篇
特种医学   51459篇
外国民族医学   660篇
外科学   197228篇
综合类   27075篇
现状与发展   1篇
一般理论   390篇
预防医学   96093篇
眼科学   27976篇
药学   95270篇
  2篇
中国医学   2454篇
肿瘤学   70985篇
  2018年   13295篇
  2017年   10084篇
  2016年   11046篇
  2015年   12554篇
  2014年   17420篇
  2013年   26534篇
  2012年   36514篇
  2011年   38561篇
  2010年   23110篇
  2009年   22102篇
  2008年   37119篇
  2007年   39742篇
  2006年   39921篇
  2005年   38866篇
  2004年   37962篇
  2003年   36753篇
  2002年   36093篇
  2001年   64018篇
  2000年   66531篇
  1999年   56448篇
  1998年   15196篇
  1997年   13807篇
  1996年   14228篇
  1995年   13489篇
  1994年   12786篇
  1993年   11823篇
  1992年   44573篇
  1991年   43479篇
  1990年   42233篇
  1989年   40127篇
  1988年   36907篇
  1987年   36256篇
  1986年   33641篇
  1985年   32294篇
  1984年   24147篇
  1983年   20277篇
  1982年   11743篇
  1981年   10710篇
  1980年   9533篇
  1979年   21345篇
  1978年   14836篇
  1977年   12541篇
  1976年   11704篇
  1975年   12628篇
  1974年   14668篇
  1973年   14129篇
  1972年   12949篇
  1971年   11737篇
  1970年   11053篇
  1969年   10031篇
排序方式: 共有10000条查询结果,搜索用时 343 毫秒
91.
92.
Background: Dense deposit disease and atypical hemolytic uremic syndrome are often caused by Complement Factor H (CFH) mutations. This study describes the retinal abnormalities in dense deposit disease and, for the first time, atypical haemolytic uremic syndrome. It also reviews our understanding of drusen pathogenesis and their relevance for glomerular disease. Methods: Six individuals with dense deposit disease and one with atypical haemolytic uremic syndrome were studied from 2 to 40 years after presentation. Five had renal transplants. All four who had genetic testing had CFH mutations. Individuals underwent ophthalmological review and retinal photography, and in some cases, optical coherence tomography, and further tests of retinal function. Results: All subjects with dense deposit disease had impaired night vision and retinal drusen or whitish-yellow deposits. Retinal atrophy, pigmentation, and hemorrhage were common. In late disease, peripheral vision was restricted, central vision was distorted, and there were scotoma from sub-retinal choroidal neovascular membranes and atypical serous retinopathy. Drusen were present but less prominent in the young person with atypical uremic syndrome due to a heterozygous CFH mutation. Conclusions: Drusen are common in forms of C3 glomerulopathy caused by compound heterozygous or heterozygous CFH mutations. They are useful diagnostically but also impair vision. Drusen have an identical composition to glomerular deposits. They are also identical to the drusen of age-related macular degeneration, and may respond to the same treatments. Individuals with a C3 glomerulopathy should be assessed ophthalmologically at diagnosis, and monitored regularly for vision-threatening complications.  相似文献   
93.
Obtaining accurate assessment data from adolescents in treatment aids clinical decision making and facilitates more accurate outcome evaluations. However, findings could be biased due to underreported substance use and mental health symptoms. This article compares self-reports of youth in non-White matched client–assessor dyads and those in nonmatched dyads. There were no differences on self-reported substance use, but matched youth reported significantly fewer attention deficit/hyperactivity disorder symptoms versus the comparison group. One possible reason for these findings is the effect of in-group stereotype threat. Future studies should examine the potential effect that in-group stereotyping and perceived racism have on the therapeutic relationship.  相似文献   
94.
95.
96.
97.
98.
99.
100.
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   
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