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   2132篇
  免费   210篇
  国内免费   87篇
  2024年   4篇
  2023年   37篇
  2022年   17篇
  2021年   34篇
  2020年   89篇
  2019年   121篇
  2018年   84篇
  2017年   123篇
  2016年   97篇
  2015年   71篇
  2014年   77篇
  2013年   383篇
  2012年   58篇
  2011年   88篇
  2010年   42篇
  2009年   111篇
  2008年   110篇
  2007年   92篇
  2006年   72篇
  2005年   88篇
  2004年   74篇
  2003年   66篇
  2002年   60篇
  2001年   67篇
  2000年   41篇
  1999年   29篇
  1998年   40篇
  1997年   32篇
  1996年   24篇
  1995年   53篇
  1994年   17篇
  1993年   6篇
  1992年   10篇
  1991年   6篇
  1989年   5篇
  1988年   9篇
  1987年   3篇
  1985年   8篇
  1984年   12篇
  1983年   11篇
  1982年   5篇
  1981年   7篇
  1980年   12篇
  1979年   9篇
  1978年   6篇
  1977年   7篇
  1976年   4篇
  1975年   2篇
  1974年   4篇
  1973年   1篇
排序方式: 共有2429条查询结果,搜索用时 281 毫秒
921.
1型糖尿病动物模型干预研究显示有效阻断口细胞自身免疫性损伤可阻止或逆转新发生的糖尿病。已完成的临床免疫调节干预研究的结果并不令人满意,目前有数百项Ⅰ、Ⅱ期临床阶段的干预试验研究在招募或进行中。早期临床试验发现长期服用T细胞抑制剂环孢素A可提高新诊断1型糖尿病的缓解率,但是由于担心其长期服用所致的肾毒性等不良反应,终止了其在1型糖尿病治疗中的进一步应用。目前针对1型糖尿病免疫调节治疗主要集中在抗原特异性(胰岛素、谷氨酸脱羧酶65)、抗原非特异性(抗淋巴细胞单克隆抗体)免疫调节治疗和促进β细胞新生等措施方面,这三大类措施的联合应用有可能实现更有效的干预效果和较低的毒副作用。目前针对1型糖尿病的三级预防临床研究的现实意义较一、二级预防研究更大,可在较短时间内、花费更少的资金和精力获得更有效的干预措施,而这些试验的成功更加有利于一、二级1型糖尿病的预防。寻找更准确的1型糖尿病发病预测和评价干预效果的方法是成功探索1型糖尿病干预手段的关键之处。  相似文献   
922.
This article presents a review of studies that have investigated the neuropsychological effects of antiretroviral treatment (ART) for HIV-1 infection. It provides a brief overview of the era of monotherapy, dual-therapy, and an extended overview of the current era of combination antiretroviral therapy (CART). This review highlights that while CART has had a dramatic effect on the incidence and the severity of HIV-associated neurocognitive disorders (HAND), HAND, in its mild form, still remains prevalent. New causes of this sustained prevalence are poor CNS penetration of some antiretroviral agents, drug resistance, poor adherence, potential neurotoxicity, co-morbidities such as the long-term CART side effects in relation to cardio-vascular disease, and chronic HIV brain infection that may facilitate the expression of new forms of neurodegenerative processes. The review emphasizes the need to address methodological limitations of published studies and the need for large and representative cross-disciplinary longitudinal investigations across the HIV illness span.  相似文献   
923.
In China, HIV shifts the lifestyle of not only parents living with HIV/AIDS, but also their children, partners, and extended families. We examined factors related to the quality of life of parents living with HIV and the relation between family functioning and individual quality of life. Interviews were conducted with a total of 116 parents living with HIV/AIDS. Analyses of variance, Pearson correlations, and multiple regression analyses were performed to examine the relation between family functioning and quality of life. We found a significant association between family functioning and individual quality of life for parents living with HIV. In particular, family sociability had a strong relationship with the quality of life of parents living with HIV. Parents living with HIV from families where both parents are HIV-positive reported a lower level of family sociability than those from families with only one HIV-positive parent. HIV disclosure, family sociability, and number of children per family were found to be significant predictors of overall quality of life for the population. Study findings underscore the importance of developing interventions that improve family functioning for people living with HIV/AIDS in China.  相似文献   
924.
Intraindividual patterns of time-lagged relationships among self-reports of worldviews/religious beliefs, self-concept, and physical and psychological well-being were investigated. Participants were older adults (mean age = 77 years) who were measured weekly covering a total of 25 weeks. Dynamic Factor Models were fitted to multivariate repeated measures data pooled over subsets of participants. The results showed significant time-lagged cross-factor relationships suggesting that worldviews/religious beliefs had a significant direct effect on self-concept and physical health over 2 weeks. For each factor series, there were substantial autoregressive effects indicating persisting effects of factors on themselves over 1 or 2 weeks. A link between worldviews/religious beliefs and physical health was found in the time-lagged structure of within-person variability. The findings underscore the need to study both intraindividual change and interindividual differences in intraindividual variability to obtain a better understanding of behavior and behavioral development.
Jungmeen KimEmail:
  相似文献   
925.
The purpose of this study was to assess the mediating effect of self-efficacy on the relationship between identity styles and academic achievement. Four-hundred high school students (200 male, 200 female) who were selected through cluster random sampling, completed the Revised Identity Styles Inventory (ISI, 6G) and Morgan-Jink Student Efficacy Scales (MJSES). Path analysis was used to analyze the data. In general, the results indicated that informational identity style had a positive direct impact on academic achievement, while diffuse/avoidance identity style had a negative effect on academic achievement. Data also suggested that informational and normative identity style had a positive influence on academic achievement through the mediation of academic self-efficacy.
Elaheh HejaziEmail:
  相似文献   
926.
该文运用任务分离法和Remember/Know程序,分别以图形和汉词为材料,研究集中注意和重度分散注意条件下内隐记忆和熟悉性的关系,以揭示外显记忆中熟悉性的属性,结果发现:(1)知觉性内隐记忆在集巾注意和蕈度分散注意下差异不显著,再认中的熟悉性在这两种注意水平下差异显著;(2)概念性内隐记忆、线索回忆中的熟悉性在两种注意水平下差异均显著.据此熟悉性和知觉性内隐记忆相分离,与概念性内隐记忆未出现分离,从而可以推测外显记忆中的熟悉性主要受语义流畅性加工调节.  相似文献   
927.
This study examined the relationship between social fears and the three subscales of the Anxiety Sensitivity Index (ASI) in a non‐clinical, student sample. In particular, the unique variance that the three ASI factors accounted for in social scrutiny fears, social interaction fears, and fear during a social challenge was investigated. Anxiety Sensitivity–Social Concern (AS‐Social Concern) was hypothesised to account for a significant proportion of the variance in social fears compared to the other two subscales. Seventy one university students completed a series of psychological‐based questionnaires and participated in a social challenge (videotaped speech task). Contrary to prediction, AS‐Social Concern did not account for a unique proportion of the variance in social fears, but AS‐Physical Concern and AS‐Mental Concern did account for unique variance in social fears. Results are interpreted in light of recent findings on the structure of ASI.  相似文献   
928.
The current review provides a qualitative assessment of the efficacy of dialectical behaviour therapy (DBT) as adapted for adolescents. The aim was to assess the efficacy of DBT compared to usual methods in the treatment of adolescent mental health symptoms, inclusive of suicidal ideation and self‐harm. Computerised databases including Medline and PsycINFO were accessed and knowledgeable informants in the area of DBT were contacted. Inclusion criteria required the studies to be clinical trials on DBT provided to adolescents. Due to the requirements on research design only three studies were appropriate for review. The review focused on quality assessment of the current data, including investigation into the effects of selection bias, confounding variables, outcome measures and measurement errors. The data suggest that there is some evidence for DBT being effective in reducing symptoms of mental health, especially those consistent with borderline personality disorder. The resultant data, however, are of very poor quality, and as such the review addresses ways to improve the quality of research and offers suggestions for future research.  相似文献   
929.
930.
Reasons behind older adults' under‐utilisation of mental health services are complex. Barriers to access to mental health services for this group include service access and availability, attitudes of medical and mental health professionals, and attitudes of older people themselves. This questionnaire‐based study sought to investigate variables that may influence attitudes towards psychological help seeking among a late mid‐age–young‐old Australian sample of 159 community‐dwelling adults. The results suggest that attitudes towards seeking psychological help in this population were relatively positive. In addition, >50% of participants in the sample indicated that they had sought treatment for emotional or psychological difficulties in the past, with the greatest proportion of those who sought help noting that it was for “family problems” (56%). The findings suggest that negative attitudes to help seeking in this age group may not be as pervasive as previously assumed, and that help‐seeking behaviours may be high among those with positive attitudes towards help seeking.  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