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   66050篇
  免费   2717篇
  国内免费   47篇
  2020年   773篇
  2019年   929篇
  2018年   1351篇
  2017年   1353篇
  2016年   1415篇
  2015年   983篇
  2014年   1162篇
  2013年   5650篇
  2012年   2111篇
  2011年   2337篇
  2010年   1377篇
  2009年   1351篇
  2008年   2019篇
  2007年   1987篇
  2006年   1733篇
  2005年   1584篇
  2004年   1552篇
  2003年   1415篇
  2002年   1449篇
  2001年   2255篇
  2000年   2158篇
  1999年   1587篇
  1998年   818篇
  1997年   709篇
  1996年   633篇
  1995年   625篇
  1994年   600篇
  1993年   627篇
  1992年   1280篇
  1991年   1214篇
  1990年   1213篇
  1989年   1106篇
  1988年   1066篇
  1987年   1040篇
  1986年   1057篇
  1985年   1092篇
  1984年   859篇
  1983年   747篇
  1982年   575篇
  1979年   817篇
  1978年   626篇
  1975年   744篇
  1974年   823篇
  1973年   764篇
  1972年   711篇
  1971年   630篇
  1969年   611篇
  1968年   721篇
  1967年   687篇
  1966年   626篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Within a multivariate statistical design, the relationship of various interpersonal, emotional, and cognitive variables to suicidal ideation and behavior in college students was examined. A total of 158 subjects (58 males, 100 females) completed self-report measures of life stress, faulty cognitions, loneliness, depression, hopelessness, family cohesiveness, adaptive reasons for living, and suicidal ideation and behavior. The results of a multiple-regression analysis, forward-inclusion algorithm, indicated that a predictive equation consisting of loneliness, irrational beliefs, and low adaptive reasons for living best accounted for suicidal behavior scores. To determine the basic structures and power of the predictor variables under study, a factor analysis and composite regression were employed, resulting in a predictive equation consisting of three factors: Social/Emotional Alienation, Cognitive Distortions, and Deficient Adaptive Resources. Results are discussed in terms of an interactional model of suicidal behavior.  相似文献   
992.
993.
Daily life events were grouped according to their life content area and according to the desirability of the event as rated by the subject. Associations among event groupings and concurrently measured daily mood were examined. As in studies of major life events, some event classifications were more strongly associated with mood than were others: Specifically, desirable family-leisure events and undesirable work events were strongly related to mood. The results suggests that particular life areas deserve special attention in understanding environmental stress.  相似文献   
994.
995.
A report on the clinical testing of the lithium-retard medicament Contemnol (Spofa). It details the way lithium-retard treatment is objectively and subjectively superior to the earlier and still current general lithium treatment.  相似文献   
996.
The results of an evaluation of the perfusion scintigraphy findings of 350 hospitalised neurological patients and 55 more strictly selected neurosurgical patients with cerebrovascular complaints, revealed an accuraty of 83%, a sensitivity of 89%, and a specificity of 83%. The selection of the patients had no influence on the results as a whole. Compared with contrast-medium angiography, incorrect diagnosis must be expected in 17% of the cases. This includes erroneous negative findings in 10% of the cases. Grounds for misinterpretations are suggested, and the biological and methodological limitations of the method are set forth.  相似文献   
997.
The paper is concerned with an attempt to generalize and categorize current hypotheses on the biochemical basis of ECT. The hypotheses are critically evaluated with respect to the relevance of their experimental fundamentals. Thus, certain hypotheses are valid only in a qualified sense. Particular interest is focussed on those conceptions which try to correlate ECT-induced changes in synaptic receptor sensitivities (up-/down-regulation) with super- resp. subsensitivity hypotheses of psychoses. In this connection, noradrenergic and opioid systems on the one hand, and the axis hypothalamus-hypophysis on the other hand seem to play a dominant role.  相似文献   
998.
Monopolar and bipolar phasic psychoses can be differentiated not only on the course but also on the symptom pattern. This applies also to the euphoric forms which usually are still assigned to Manic-depressive illness. The differential diagnosis is presented. Aetiology is completely different in the monopolar and the bipolar phasic psychoses. Manic-depressive illness has a hereditary basic, whereas in the monopolar ("pure") forms loading is very low. Particularly few psychoses among the relatives have been found in the euphoric forms which demonstrates their independency for if they would belong to Manic-depressive illness they necessarily would show the heavy genetic loading of this bipolar illness. In the pure phasic psychoses external causes were detected when we focused on the sibships in which the probands had grown up. The euphoric patients had relatively many older siblings, the depressive ones relatively few older siblings. A similar difference was found in two cycloid psychoses. Transcultural observations as well as shifts in the incidence rate of the psychoses in our times confirmed our results. Prophylactic measures can be derived.  相似文献   
999.
The paper presents the results of detailed diagnosis of 51 patients with torticollis spasmodicus. A discussion of the results would seem to indicate the possibility of there being one group with prior neuroses, one group compulsive in nature, and one group whose diminished performance arises from the condition of the brain. Reliable diagnosis is only possible when both mental and physical parameters have been taken into consideration.  相似文献   
1000.
The centenary of Hermann Emminghaus's monograph "Die psychischen St?rungen des Kindesalters" ("The Psychic Disorders of Childhood") gives occasion to appreciate the life and work of the founder of modern children and youth psychiatry. Children and youth psychiatry, in the G.D.R., operates on the principle of sub-specialization out of its parent subjects. In this, Hermann Emminghaus's basic views, as expressed in his monograph of 1887, are confirmed.  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