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   9660篇
  免费   491篇
  国内免费   89篇
耳鼻咽喉   70篇
儿科学   225篇
妇产科学   313篇
基础医学   964篇
口腔科学   174篇
临床医学   820篇
内科学   2597篇
皮肤病学   67篇
神经病学   1019篇
特种医学   466篇
外科学   1460篇
综合类   30篇
一般理论   3篇
预防医学   409篇
眼科学   135篇
药学   598篇
中国医学   19篇
肿瘤学   871篇
  2023年   50篇
  2022年   164篇
  2021年   288篇
  2020年   149篇
  2019年   249篇
  2018年   313篇
  2017年   228篇
  2016年   251篇
  2015年   293篇
  2014年   390篇
  2013年   490篇
  2012年   756篇
  2011年   729篇
  2010年   391篇
  2009年   412篇
  2008年   589篇
  2007年   580篇
  2006年   583篇
  2005年   595篇
  2004年   519篇
  2003年   503篇
  2002年   448篇
  2001年   112篇
  2000年   96篇
  1999年   99篇
  1998年   97篇
  1997年   94篇
  1996年   73篇
  1995年   56篇
  1994年   51篇
  1993年   36篇
  1992年   60篇
  1991年   46篇
  1990年   44篇
  1989年   25篇
  1988年   40篇
  1987年   30篇
  1986年   38篇
  1985年   35篇
  1984年   23篇
  1983年   24篇
  1982年   28篇
  1981年   24篇
  1980年   18篇
  1979年   9篇
  1978年   24篇
  1977年   10篇
  1974年   8篇
  1972年   13篇
  1968年   7篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Henoch‐Schonlein purpura (HSP) is the most common systemic vasculitis in childhood. There is no consensus about the management for isolated cutaneous manifestations in HSP. We describe a case of HSP presenting with severe skin lesions that did not respond to standard therapy with corticosteroids. The 11‐year‐old child was treated with intravenous immunoglobulins, which induced rapid and persistent resolution of symptomatology.  相似文献   
2.
3.
Even if the relationships between nutrition and inflammatory bowel disease (IBD) remain underexplored, the current literature is providing, day by day, much more evidence on the effects of various diets in both prevention and treatment of such illnesses. Wrong dietary habits, together with other environmental factors such as pollution, breastfeeding, smoke, and/or antibiotics, are among the theoretical pathogenetic causes of IBD, whose multifactorial aetiology has been already confirmed. While some of these risk factors are potentially reversible, some others cannot be avoided, and efficient treatments become necessary to prevent IBD spread or recurrence. Furthermore, the drugs currently available for treatment of such disease provide low-to-no effect against the symptoms, making the illnesses still strongly disabling. Whether nutrition and specific diets will prove to effectively interrupt the course of IBD has still to be clarified and, in this sense, further research concerning the applications of such dietary interventions is still needed.  相似文献   
4.
5.
6.
Stress related to parenting a child with autism spectrum disorder can differently affect caregiver's physiological reactivity to acute stress. Here, parental stress levels, psychological characteristics, and coping strategies were assessed alongside measures of heart rate, heart rate variability, and cortisol during a psychosocial stress test in mothers of children with ASD (M‐ASD, n = 15) and mothers of typically developing children (n = 15). M‐ASD reported significantly higher levels of parental stress, anxiety, negative affectivity, social inhibition, and a larger preference for avoidance strategies. M‐ASD showed larger heart rate and cortisol responses to the psychosocial stress test. A positive relationship was found between parental stress levels and the magnitude of the cortisol stress response in both groups. The present findings indicate exaggerated physiological reactivity to acute psychosocial stress in M‐ASD and prompt further research to explore the role of individual differences in mediating the effects of parental stress on physiological stress responses.  相似文献   
7.
Objectives. Traditional deep brain stimulation (DBS) at the subthalamic nucleus (STN) has proved to be efficacious on core Parkinsonian symptoms. However, very disabling l ‐dopa–induced abnormal involuntary movements (AIMs) and axial signs are slightly affected, suggesting that we target less conventional targets. Our candidates for DBS were the globus pallidus internus (GPi) plus the intralaminar thalamic complex (Pf or CM), given its extensive functional links with basal ganglia nuclei. Materials and Methods. The routine utilization of our innovative stereotactic apparatus allows us to implant, at the same time, both the CM‐Pf complex together with the GPi in six Parkinson disease patients. Both intraoperative and postoperative neurophysiologic assessments helped us recognize functional subregions while optimizing implantation of electrodes. Unified Parkinson disease rating scale (UPDRS) motor scores, AIMs, and freezing were carefully blindly evaluated for each condition. Results. A significant amelioration of UPDRS scores was achieved by simultaneous activation of both targets. CM‐Pf activation was only slightly effective in reducing rigidity and akinesia, but more efficacious on freezing. Not surprisingly, AIMs were peculiarly decreased by the activation of the permanent electro‐catheter in the posteroventral GPi. Conclusions. These findings confirm that, in selected patients, it is conceivable to target structures other than the conventional STN in order to maximize clinical benefit.  相似文献   
8.
Idiopathic Headache as a Possible Risk Factor for Phantom Tooth Pain   总被引:1,自引:0,他引:1  
Following tooth pulp extirpation, some subjects suffer from persistent pain which affects edentate sites in absence of any local pathology. As regards this peculiar pain, called phantom tooth pain (PTP), what is puzzling is the fact there is a low prevalence of PTP in a very large population showing identical conditions of tooth pulp extirpation. The present investigation indicates that PTP mainly affects migraine (M) and cluster headache (CH) sufferers, whereas it does not affect subjects who have a negative personal and family history for idiopathic headache (IH). These results circumscribe the presence of PTP to a specific section of the population. The present results, besides indicating that PTP may be the result of a peculiar neuronal predisposition relating to IH pathogenesis, suggests some practical therapeutic hints. In fact, successful anti- M and anti-CH prophylactic treatment greatly improve PTP syndrome.  相似文献   
9.
10.
Hum Psychopharmacol 2007; 22 : 121–128. DOI: 10.1002/hup.836 It has come to our attention that there was an error contained in the above article within the abstracts heading relating to Methods. The article stated that: ‘A literature search was conducted within PsychoINFO’. This should have been published as: ‘A literature search was conducted within PsycINFO’. We apologise for this anomaly.  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