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   937篇
  免费   49篇
耳鼻咽喉   8篇
儿科学   43篇
妇产科学   13篇
基础医学   140篇
口腔科学   13篇
临床医学   126篇
内科学   185篇
皮肤病学   5篇
神经病学   141篇
特种医学   14篇
外科学   91篇
综合类   9篇
一般理论   1篇
预防医学   117篇
眼科学   14篇
药学   36篇
中国医学   1篇
肿瘤学   29篇
  2024年   1篇
  2023年   10篇
  2022年   11篇
  2021年   31篇
  2020年   16篇
  2019年   34篇
  2018年   50篇
  2017年   34篇
  2016年   26篇
  2015年   26篇
  2014年   41篇
  2013年   56篇
  2012年   76篇
  2011年   68篇
  2010年   46篇
  2009年   34篇
  2008年   75篇
  2007年   65篇
  2006年   66篇
  2005年   47篇
  2004年   52篇
  2003年   22篇
  2002年   40篇
  2001年   12篇
  2000年   7篇
  1999年   6篇
  1998年   6篇
  1997年   7篇
  1996年   5篇
  1995年   3篇
  1994年   1篇
  1993年   1篇
  1992年   1篇
  1988年   1篇
  1986年   1篇
  1985年   2篇
  1979年   1篇
  1978年   1篇
  1972年   1篇
  1971年   1篇
  1968年   2篇
排序方式: 共有986条查询结果,搜索用时 31 毫秒
201.
Compared to white adults, blacks are less likely to be aware of their cardiovascular risk factors and are less likely to respond appropriately to signs and symptoms of a myocardial infarction or stroke. This fact highlights the need for better dissemination of health information about cardiovascular disease among communities of color. Community health workers (CHWs) are important resources for disseminating health information. Recognizing this important role of CHWs, the Greater Southern Brooklyn Health Coalition and its community and academic partners developed a workshop designed to educate CHWs about the risk factors, signs and symptoms of cardiovascular disease. The purpose of this workshop was to educate CHWs so that they themselves could be better informed and thus, be in a better position to educate their respective clients. The resulting workshop, Taking Action Against Cardiovascular Disease in Our Communities: A Training for Service Providers, was a half-day workshop attended by 70 CHWs from various community service organizations. Approximately 97% of attendees said that the workshop met their expectations. More than half said they learned the signs and symptoms of cardiovascular disease and about 90% said that they received clear and concrete information that they could use with their clients. These evaluations also provided critiques regarding aspects of the workshop that could be improved upon and other information which will be used as a formative tool in developing future educational initiatives. In conclusion, this workshop demonstrated that it was feasible to develop effective community programs targeted at educating CHWs about cardiovascular disease.  相似文献   
202.
We investigated the safety, feasibility, and efficacy of transcranial direct current stimulation (tDCS) combined with constraint-induced movement therapy (CIMT) in children and young adults with unilateral cerebral palsy. Twenty participants were randomized to receive active or sham tDCS. The intervention consisted of 10 consecutive weekday sessions of tDCS applied to the non-lesioned hemisphere (20 min) concurrently with CIMT (120 min). Participants, caregivers, and interventionists were blinded to group assignment. The primary safety outcome investigated adverse events. The primary behavioral outcome was the Assisting Hand Assessment. All 20 participants (mean age = 12.7 yrs, range = 7.4–21.6 years) were evaluated for the primary outcomes. No serious adverse events occurred, and the most commonly reported minor adverse events were headache and itchiness. Both groups demonstrated a significant improvement in hand function after the intervention, although no significant effect of tDCS was observed (between-group difference = ?2.18, 95% CI = [?6.48, 2.12], p = 0.30). Although hand function improved overall, no significant differences between intervention groups were found. Children with preserved corticospinal tract circuitry from the lesioned hemisphere, compared to those without, showed greater improvement in hand function (mean difference = 3.04, 95% CI = [?0.64, 6.72], p = 0.099). Our study demonstrates the safety and feasibility of serial sessions of tDCS, and presents preliminary evidence for the effect of CST circuitry on outcomes following tDCS/CIMT. Future work in children with unilateral cerebral palsy should focus on the optimal dosing and consider individual brain circuitry when describing response to combined interventions.

Clinical Trials Registration

Clinicaltrials.govNCT 02250092.  相似文献   
203.
A consistent theme in the literature on interventions for orphans and vulnerable children is the need for community-based care. However, a number of socio-cultural factors may impede community response. In this study, mixed methods are used to elucidate community-level barriers to care for orphans and vulnerable youth in Rwanda. Data from a large survey of youth heads of household on perceptions of marginalization from the community and the factors predicting that marginalization are considered in light of additional data from a survey of adults who volunteered to mentor these youth and focus groups with both community adults and youth heads of household. Results highlight how orphans' impoverished condition, cause of parents' death, and community perceptions of orphan behavior play a role in the marginalization of orphaned youth in Rwanda. Evidence is also offered to show that targeting humanitarian assistance to vulnerable youth may inadvertently lessen the level of community support they receive and contribute to their marginalization. The implications of these data for community-based program approaches are discussed.  相似文献   
204.
205.
Background:  This study examined preschoolers' emotion regulation (ER) strategies and the association with temperament, maternal interactive style, and maternal history of childhood-onset depression (COD).
Methods:  Participants were 62 children and their mothers, 37 of whom had mothers with COD. Children's ER was assessed using a disappointment paradigm; temperament assessment also was laboratory-based.
Results:  Maternal COD was inversely related to offspring's active ER and positive mood. Among children of COD mothers, behavioral inhibition was associated with passive regulation and sadness, and maternal positivity toward these children was associated with child active ER and positive mood.
Conclusion:  Behavioral inhibition may place children of COD mothers at risk for developing maladaptive ways of regulating negative emotion, whereas mothers' positivity may serve as a protective factor for them.  相似文献   
206.
This article explores the length of time between key events in the criminal prosecution of child sexual abuse cases (charging decision, case resolution process, and total case-processing time), which previous research suggests is related to victims' recovery. The sample included 160 cases in three communities served by the Dallas County District Attorney. Most cases (69%) took at least 60 days for the charging decision, with cases investigated at the Children's Advocacy Center having a quicker time than either comparison community. Only 20% of cases had a case resolution time within the 180-day target suggested by the American Bar Association standard for felonies. Controlling for case characteristics, one of the three communities and cases with an initial arrest had a significantly quicker case resolution time. Total case processing generally took more than 2 years. Implications include the need to better monitor and shorten case resolution time.  相似文献   
207.

Introduction

The Mycobacterium tuberculosis East African-Indian (EAI) spoligotyping family (belonging to lineage 1, Indo-Oceanic, defined by the region of deletion RD239) is distributed worldwide, but is more prevalent in Southeast Asia, India, and East Africa. Studies in Latin America have rarely identified EAI. In this study, we describe the occurrence of the EAI family in Brazil.

Methods

EAI was identified in a systematic literature review of genetic diversity studies pertaining to M. tuberculosis in Brazil, as well as in a survey conducted in Salvador, Bahia, located in the northeastern region of this country.

Results

The EAI6-BGD1 spoligotyping family and the EAI5 Spoligotype International Type (SIT) 1983 clade were the most frequently reported, with wide distribution of this particular clade described in Brazil. The distribution of other EAI spoligotyping patterns with broader worldwide distribution was restricted to the southeastern region of the country.

Conclusions

EAI may be endemic at a low frequency in Brazil, with some clades indicating increased fitness with respect to this population.  相似文献   
208.
209.
Children exposed to disasters are at an increased likelihood for multiple trauma exposure. The objective of our study is to understand the efficacy of post disaster school based services for reducing trauma symptoms of youth exposed to multiple traumatic events. Students (N = 112) age 8–17 that were survivors of Hurricane Katrina received individual treatment for multiple traumas on site at school. We used repeated measures ANOVA to investigate the effectiveness in self-reported trauma symptoms over time. Results indicated significant reduction in overall posttraumatic stress symptoms as well as subscales assessing anxiety, anger, depression, dissociation, overt dissociation, and fantasy dissociation. The school based services for students with multiple traumas were effective at reducing trauma symptoms following disaster.  相似文献   
210.
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