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   46235篇
  免费   3633篇
  国内免费   499篇
耳鼻咽喉   808篇
儿科学   2669篇
妇产科学   532篇
基础医学   4358篇
口腔科学   700篇
临床医学   3668篇
内科学   4436篇
皮肤病学   929篇
神经病学   15575篇
特种医学   1375篇
外科学   3657篇
综合类   3156篇
现状与发展   2篇
一般理论   1篇
预防医学   3165篇
眼科学   570篇
药学   3232篇
  8篇
中国医学   980篇
肿瘤学   546篇
  2024年   106篇
  2023年   887篇
  2022年   1188篇
  2021年   2102篇
  2020年   1779篇
  2019年   1889篇
  2018年   1855篇
  2017年   1822篇
  2016年   1727篇
  2015年   1507篇
  2014年   2471篇
  2013年   3516篇
  2012年   1902篇
  2011年   2333篇
  2010年   1824篇
  2009年   1869篇
  2008年   2018篇
  2007年   1851篇
  2006年   1461篇
  2005年   1190篇
  2004年   1038篇
  2003年   1113篇
  2002年   1848篇
  2001年   1988篇
  2000年   2123篇
  1999年   1412篇
  1998年   1436篇
  1997年   1236篇
  1996年   719篇
  1995年   387篇
  1994年   231篇
  1993年   190篇
  1992年   183篇
  1991年   178篇
  1990年   145篇
  1989年   144篇
  1988年   115篇
  1987年   87篇
  1986年   47篇
  1985年   94篇
  1984年   66篇
  1983年   60篇
  1982年   66篇
  1981年   42篇
  1980年   32篇
  1979年   23篇
  1978年   15篇
  1977年   23篇
  1976年   13篇
  1975年   6篇
排序方式: 共有10000条查询结果,搜索用时 175 毫秒
91.
This study tests the effectiveness of adding an eight-month, thirty-session schema-focused therapy (SFT) group to treatment-as-usual (TAU) individual psychotherapy for borderline personality disorder (BPD). Patients (N = 32) were randomly assigned to SFT-TAU and TAU alone. Dropout was 0% SFT, 25% TAU. Significant reductions in BPD symptoms and global severity of psychiatric symptoms, and improved global functioning with large treatment effect sizes were found in the SFT-TAU group. At the end of treatment, 94% of SFT-TAU compared to 16% of TAU no longer met BPD diagnosis criteria (p < .001). This study supports group SFT as an effective treatment for BPD that leads to recovery and improved overall functioning.  相似文献   
92.
目的探讨学习障碍血清脑源性神经营养因子(BDNF)水平的变化,及其与学习障碍病理基础的关系。方法患者组为22例未治疗过且不共患其他疾病的学习障碍患儿,对照组为16例年龄性别匹配正常儿童,以瑞文标准推理测验(SPM)测定智商,BDNF采用酶联夹心免疫吸附法检测。结果LD患者血清BDNF浓度为:平均(4.603±3.620)ng/ml高于对照组(1.843±0.728)ng/ml(t=3.326,P=0.003<0.01)。边缘智商组(4.523±4.618)ng/ml,与正常对照组比较差异有非常显著性(P=0.008<0.01)。结论学习障碍患儿血清BDNF浓度高于正常儿童,边缘智商者升高更明显。  相似文献   
93.
94.
95.
BACKGROUND: Facial emotions are central to human interaction. Identifying pathophysiology in affect processing circuitry that supports the ability to assess facial emotions might facilitate understanding of affect regulation in pediatric bipolar disorder. METHODS: Ten euthymic, unmedicated pediatric bipolar patients and 10 healthy control subjects matched for age, gender, race, socioeconomic status, and IQ were scanned with functional magnetic resonance imaging. Angry, happy, and neutral faces were presented in 30-sec blocks, with a 20-sec rest period between blocks. Subjects were asked to press a button when each face appeared, to ensure that attention was maintained on-task. RESULTS: In bipolar patients, in response to both angry and happy faces relative to neutral faces, we observed reduced activation of right rostral ventrolateral prefrontal cortex together with increased activity in right pregenual anterior cingulate, amygdala, and paralimbic cortex. Bipolar patients also showed reduced activation of visual areas in occipital cortex together with greater activation in higher-order visual perceptual areas, including superior temporal sulcus and fusiform gyrus with angry faces and posterior parietal cortex with happy faces. CONCLUSIONS: Findings document a disturbance in affective neurocircuitry in pediatric bipolar disorder. Reduced activation in ventrolateral prefrontal cortex might reflect diminished top-down control that leads to the observed exaggerated activation in amygdala and paralimbic areas. Changes in occipital areas might represent an effort to gate sensory input when affective responses to the faces could not be successfully modulated. Disturbances in affect processing circuitry could contribute to emotional dysregulation and social cognitive difficulties in bipolar youth.  相似文献   
96.
We report a 51-year-old patient with severe haemophilia A developing a severe life-threatening anaphylactic reaction to recombinant factor VIII (rFVIII). Anaphylactic reactions are a rare but well-known side effect of FVIII products. The nature of these reactions could not be clarified as previous studies failed to demonstrate a specific IgE response. Here, we could prove a grade 3 anaphlyactic reaction as an IgE-mediated response to rFVIII for the first time by Western blotting.  相似文献   
97.
烧伤后机体应激导致代谢紊乱,表现为严重高分解代谢,机体损耗和抵抗力下降,严重影响患者预后。临床上主要采用生理营养指标、实验室诊断指标和能量消耗测定3类检测指标对机体代谢状况进行诊断评估,继而通过药物治疗结合非药物治疗手段加以调理支持,促进烧伤修复。目前,仍有多种诊断治疗方法尚未普及或有待完善。  相似文献   
98.
Most deaths occurring in connection with car fires are the result of traffic accidents. With regard to differential diagnosis, suicides and homicides also have to be kept in mind. Compared with other charred bodies, for example from house fires, they show stronger consumption by the fire, which makes it more difficult to assess the case at autopsy and to identify the victims. In fires occurring after traffic accidents, the question to be answered is whether death was caused by the fire or by any accident-related injuries. While in the presence of potentially fatal injuries perimortem burning has to be discussed, it may be difficult to differentiate peracute death due to the effect of heat from purely postmortem burning. The most important signs of vital exposure to the fire are soot deposits in the respiratory tract, the oesophagus and the stomach as well as an elevated COHb concentration in the corpse blood. In deaths occurring after car fires due to collisions, the COHb values are usually <40%, often even <20%. Higher values are seen especially when the fire started in the passenger compartment.  相似文献   
99.
100.
Nocturnal Sleep‐Related Eating Disorder (NSRED) is a well‐documented sleeping disorder where the person is reported to experience bizarre eating behavior during sleep. Although various causes are implicated in this disorder, role of drugs cannot be ruled out. Here we narrate an interesting rare case report of a drug‐induced new onset NSRED, where a 45‐year‐old man on zolipdem performed an unexpected and bizarre eating behavior during somnambulistic state, type of which has not been reported earlier in the literature. The case falls under even rarer category as such behavior in sleep is reported mainly in woman. © 2008 by Wiley Periodicals, Inc. Int J Eat Disord 2009  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