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   2071篇
  免费   96篇
  国内免费   24篇
耳鼻咽喉   5篇
儿科学   46篇
妇产科学   6篇
基础医学   210篇
口腔科学   5篇
临床医学   156篇
内科学   93篇
皮肤病学   3篇
神经病学   755篇
特种医学   120篇
外科学   92篇
综合类   156篇
预防医学   382篇
眼科学   2篇
药学   97篇
中国医学   1篇
肿瘤学   62篇
  2023年   41篇
  2022年   52篇
  2021年   75篇
  2020年   77篇
  2019年   65篇
  2018年   59篇
  2017年   83篇
  2016年   96篇
  2015年   67篇
  2014年   127篇
  2013年   216篇
  2012年   96篇
  2011年   167篇
  2010年   93篇
  2009年   118篇
  2008年   128篇
  2007年   109篇
  2006年   98篇
  2005年   65篇
  2004年   55篇
  2003年   43篇
  2002年   32篇
  2001年   24篇
  2000年   25篇
  1999年   28篇
  1998年   20篇
  1997年   29篇
  1996年   3篇
  1995年   10篇
  1994年   14篇
  1993年   9篇
  1992年   8篇
  1991年   5篇
  1990年   4篇
  1989年   2篇
  1988年   6篇
  1987年   2篇
  1986年   6篇
  1985年   9篇
  1984年   3篇
  1982年   3篇
  1979年   2篇
  1978年   2篇
  1977年   4篇
  1976年   2篇
  1975年   1篇
  1974年   2篇
  1969年   1篇
  1968年   1篇
  1967年   1篇
排序方式: 共有2191条查询结果,搜索用时 15 毫秒
31.
Anniversary reactions include physical and/or psychiatric responses to the anniversary of the death of a person who was significant to the decedent. In the most extreme cases this may result in suicide. Two cases of suicide are reported to demonstrate the association with specific commemorative tattoos. Case 1: A 19-year-old man was found hanging by the neck by an electric flex in a shed. A commemorative tattoo had the name of his brother who had committed suicide by hanging in the same shed 9 years and 2 days previously. Case 2: A 47-year-old woman was found hanging by the neck by a rope attached to a metal beam in a shed at her home address. A commemorative tattoo had the name of her daughter who had committed suicide by hanging in the same shed 1 year and 5 days previously. Tattooing may record significant life events and so may be useful in a forensic context in helping to identify an unknown decedent. In cases of apparent suicide, correlating the details of a tattoo at autopsy with the available history or the date of death may also provide useful information that helps to clarify reasons for the event, as well as providing data on the incidence of significant anniversary reactions involving lethal self harm.  相似文献   
32.
33.
There are indications for changes in glutamate metabolism in relation to depression or suicide. The glutamate-glutamine cycle and neuronal/glial glutamate transporters mediate the uptake of the glutamate and glutamine. The expression of various components of the glutamate-glutamine cycle and the neuronal/glial glutamate transporters was determined by qPCR in postmortem prefrontal cortex. The anterior cingulate cortex (ACC) and the dorsolateral prefrontal cortex (DLPFC) were selected from young MDD patients who had committed suicide (MDD-S; n = 17), from MDD patients who died of non-suicide related causes (MDD-NS; n = 7) and from matched control subjects (n = 12). We also compared elderly depressed patients who had not committed suicide (n = 14) with matched control subjects (n = 22). We found that neuronal located components (EAAT3, EAAT4, ASCT1, SNAT1, SNAT2) of the glutamate-glutamine cycle were increased in the ACC while the astroglia located components (EAAT1, EAAT2, GLUL) were decreased in the DLPFC of MDD-S patients. In contrast, most of the components in the cycle were increased in the DLPFC of MDD-NS patients. In conclusion, the glutamate-glutamine cycle - and thus glutamine transmission - is differentially affected in depressed suicide patients and depressed non-suicide patients in an area specific way.  相似文献   
34.
自杀是一个世界范围内严重的公共卫生问题和社会问题。WHO估计世界自杀死亡率为14.5/10 万, 相当于每40 s就有1人自杀[1]。Phillips 等[2]曾估计中国的自杀率为23/10万, 自杀是15~34 岁人群的首位死亡原因。  相似文献   
35.
36.
OBJECTIVE: To explore the association between suicide and month of birth. METHOD: Data were extracted from records of the Public Health Department in North Cheshire between 1989 and 2000. &#164 Suicide' refers to all deceased who were the subjects of coroner's inquests resulting in a verdict of suicide or an open verdict. The month of birth of all who died of natural causes and were reported during a 2-year period was obtained from the Public Health Department in North Cheshire for comparison. RESULTS: There were 502 incidents of suicide in North Cheshire during the 12-year period. Significant differences were found between suicides and deaths due to natural causes, with an increase of incidents of suicide in those born in the month of May ( &#104 2 23, d.f.11, P < 0.01). The distribution of suicide by hanging appeared to be significantly higher in those born in September and July and lowest in those born in November compared with what would expected by chance ( &#104 2 28, d.f.11, P < 0.005). Those who died by violent means were more likely to have been born in the summer. The difference between the observed and expected numbers of suicides by methods other than hanging failed to reach statistical significance. CONCLUSION: The results, though inconclusive, are interesting, particularly in view of recent reports that persons born during the winter &#45 spring months had significantly lower values of 5-HIAA, and also reports of low CSF levels of 5-HIAA in persons with violent suicidal behaviour such as hanging, stabbing, firearms, or jumping from heights and impulsivity. A biological explanation of suicidal behaviour could have implications for our understanding of the psychopathology of suicide and eventually offer new strategies for treatment and prevention. The conflicting reports from different countries within the northern hemisphere indicate the need for future studies with adequate design and acceptable statistical power.  相似文献   
37.
38.
《L'Encéphale》2020,46(4):258-263
ObjectivesIn the field of suicide prevention, the identification of risk groups is important, as is the training of front-line workers, to raise awareness of suicide issues. Agricultural workers represent a group at high risk of suicidal behavior due to various factors (low income of farmers, work related to climatic conditions, social isolation, poor access to primary care). The main objective of this article is to present the implementation of prevention training in suicide prevention for a population of agricultural workers in two cantons of French-speaking Switzerland (Vaud and Neuchâtel) which represent a population of about 980,000 inhabitants. The second objective is to identify the experiences of the participants in this training and their expectations.MethodsSuicide prevention training sessions are organized in collaboration with public health departments, agriculture departments and suicide prevention professionals. Each session is led by four trainers experienced in suicide prevention and belonging to the “Groupement Romand Prévention du Suicide” (GRPS) which manages the training and other training modules on this topic in French-speaking Switzerland. The GRPS guarantees the content of the training as well as the updating of scientific knowledge. The training model is based on a concept that alternates between brief theoretical contributions, exchanges between participants in plenary sessions and role playing in small groups. The training has two main objectives: on the one hand to work on the participants’ representations of suicide and to modify their posture by training “sentinels”, i.e. “peers” who can establish a link between suffering individuals and the available support resources. On the other hand, to give key messages: dare to talk about the suicidal question and to not remain alone with this.ResultsBetween December 2016 and May 2018, nine sessions were held in the two cantons of Vaud and Neuchâtel with a total of 220 participants. The sessions took place in agricultural schools or buildings related to agriculture. Invited to express themselves on the theme of suicide as well as on the concept of training, agricultural workers all verbalized the importance of this issue and were often very moved when the subject was discussed. The topics addressed by the participants were the taboo aspect of the subject, the difficulty of talking about it and the need to be able to address the subject (breaking the isolation). Participants also highlighted the need for peers to act as relays for help.ConclusionsThe sessions were highly appreciated by the organizers concerned, particularly by the public health and agricultural departments. Participants expressed their satisfaction at the opportunity to express their views on this subject, regretting that such initiatives are all too rare. Although studies highlight the difficulty of emotional expression in the agricultural field, we observed on the contrary a great facility of the participants to express their emotions in relation to the suicidal theme. We have highlighted that the issue of suicide in this population is linked to several causal factors, as is the suicidal issue more broadly. Factors specific to this population emerged from the sessions, including working conditions and difficulties related to the family environment of farmers. There is a need to strengthen suicide prevention with training programs among the agricultural population. We also note the major importance of improving access to mental health care which is often very deficient in rural areas.  相似文献   
39.
To understand the different dimensions of suicidal risk for children 12 and under, a scoping review inspired by the Arskey and O’Malley (2005) model was conducted. Research engines used were PubMed, Web of Science, CINAHL, EMBASE and Google Scholar. A total of 13 articles and one report, published between 2005 and 2017 in French or English, were included in this study. Findings show that overall, for both girls and boys under 12 years old suicidal ideation and verbalizations are more prevalent than attempts. The means frequently used to attempt suicide are medication intoxication, hanging and strangulation. It is very difficult to assess the suicidal intent (wish to die) behind the attempt. It often appears to be an impulsive act. Methodological bias are often present in the studies found. Furthermore, even if children do not fully understand the concept of death, they still can attempt suicide. They need to be considered seriously by people working in the health care system. It is important that their emotional pain be heard to prevent further attempts in the future.  相似文献   
40.
ObjectiveThe influence of psychopathology on suicide method has revealed different distributions among different psychiatric disorders. However, evidence is still scarce. We hypothesized that having a diagnosis of personality disorder (PD) affect the suicide method, and that different PD clusters would influence the suicide method in different ways. In addition, we hypothesized that the presence of psychiatric and somatic co-morbidity also affects the suicide method.MethodWe examined 25,217 individuals aged 15–64 who had been hospitalized in Sweden with a main diagnosis of PD the years 1987–2013 (N = 25,217). The patients were followed from the date of first discharge until death or until the end of the follow-up period, i.e. December 31, 2013, for a total of 323,508.8 person-years, with a mean follow up time of 11.7 years. The SMR, i.e. the ratio between the observed number of suicides and the expected number of suicides, was used as a measure of risk.ResultsOverall PD, different PD-clusters, and comorbidity influenced the suicide method. Hanging evidenced highest SMR in female PD patients (SMR 34.2 (95% CI: 29.3–39.8)), as compared to non-PD patients and jumping among male PD patients (SMR 24.8 (95% CI: 18.3–33.6)), as compared to non PD-patients. Furthermore, the elevated suicide risk was related to both psychiatric and somatic comorbidity.ConclusionThe increased suicide risk was unevenly distributed with respect to suicide method and type of PD. However, these differences were only moderate and greatly overshadowed by the overall excess suicide risk in having PD. Any attempt from society to decrease the suicide rate in persons with PD must take these characteristics into account.  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