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   894805篇
  免费   74361篇
  国内免费   4149篇
耳鼻咽喉   13088篇
儿科学   25013篇
妇产科学   25435篇
基础医学   127633篇
口腔科学   26030篇
临床医学   80325篇
内科学   168392篇
皮肤病学   17392篇
神经病学   71448篇
特种医学   36174篇
外国民族医学   190篇
外科学   138674篇
综合类   32147篇
现状与发展   8篇
一般理论   267篇
预防医学   69589篇
眼科学   21337篇
药学   68616篇
  44篇
中国医学   3689篇
肿瘤学   47824篇
  2018年   8378篇
  2015年   9364篇
  2014年   13284篇
  2013年   18870篇
  2012年   25689篇
  2011年   27029篇
  2010年   16275篇
  2009年   15026篇
  2008年   24775篇
  2007年   26766篇
  2006年   26546篇
  2005年   25874篇
  2004年   24776篇
  2003年   23800篇
  2002年   22756篇
  2001年   36444篇
  2000年   37078篇
  1999年   31494篇
  1998年   9577篇
  1997年   8958篇
  1996年   8743篇
  1995年   8259篇
  1994年   7941篇
  1992年   26797篇
  1991年   26220篇
  1990年   25727篇
  1989年   24747篇
  1988年   23294篇
  1987年   22957篇
  1986年   21792篇
  1985年   21134篇
  1984年   16386篇
  1983年   13967篇
  1982年   8836篇
  1981年   8170篇
  1980年   7630篇
  1979年   16698篇
  1978年   12074篇
  1977年   10136篇
  1976年   9291篇
  1975年   10109篇
  1974年   12615篇
  1973年   12117篇
  1972年   11523篇
  1971年   10668篇
  1970年   10194篇
  1969年   9894篇
  1968年   8890篇
  1967年   8211篇
  1966年   7640篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
目的探讨分诊安全管理结合风险管理提高急诊科护理质量评分的作用。方法该院于2018年6月起加强对急诊科的分诊安全管理结合风险管理,以于2017年6月—2019年6月在该院急诊科就诊的患者为研究对象,评价管理策略实施前后护理风险发生率、护理质量评分以及患者满意度等评价指标变化情况。结果实施后基础护理、实践操作、消毒隔离、急救药品、护理文件方面的护理质量评分均较实施前显著提高(P<0.05);实施后护理差错、护理缺陷、护理投诉的发生率分别为0.26%、0.58%、0.19%,均较实施前显著降低(P<0.05);实施后护理总满意率为94.92%,较实施前显著提高(P<0.05)。结论分诊安全管理结合风险管理有效提高了急诊科护理质量,提升了患者满意度,减少了护理风险事件的发生。  相似文献   
32.
Background: Poor anger regulation is considered a risk factor of aggression in individuals with mild or borderline intellectual disabilities. Psychomotor therapy (PMT) targets anger regulation through body- and movement-oriented interventions. This study aims to inform practitioners on efficacy and research-base of PMT in this population.

Method: This systematic review evaluated nine studies which met inclusion criteria in terms of participants, intervention procedures, outcomes and certainty of evidence.

Results: Seven studies revealed a substantial reduction of aggressive behaviour or anger. Certainty of evidence was rated inconclusive in most cases due to absence of experimental control.

Conclusions: We can conclude that body-oriented PMT, involving progressive relaxation and meditation procedure “Soles of the Feet”, is a promising approach. However, the paucity of studies and methodological limitations preclude classifying it as an evidence-based practice. This suggests stronger methodological research and research aimed at PMT’s mechanisms of action (e.g., improved interoceptive awareness) is warranted.  相似文献   

33.
34.
35.
36.
The catechol-O-methyltransferase (COMT) enzyme is a major determinant of prefrontal dopamine levels. The Val158Met polymorphism affects COMT enzymatic activity and has been associated with variation in executive function and affective processing. This study investigated the effect of COMT genotype on the flexible modulation of the balance between processing self-generated and processing stimulus-oriented information, in the presence or absence of affective distractors. Analyses included 124 healthy adult participants, who were also assessed on standard working memory (WM) tasks. Relative to Val carriers, Met homozygotes made fewer errors when selecting and manipulating self-generated thoughts. This effect was partly accounted for by an association between COMT genotype and visuospatial WM performance. We also observed a complex interaction between the influence of affective distractors, COMT genotype and sex on task accuracy: male, but not female, participants showed a sensitivity to the affective distractors that was dependent on COMT genotype. This was not accounted for by WM performance. This study provides novel evidence of the role of dopaminergic genetic variation on the ability to select and manipulate self-generated thoughts. The results also suggest sexually dimorphic effects of COMT genotype on the influence of affective distractors on executive function.  相似文献   
37.
38.
39.
The value of adding simeprevir (SMV) vs placebo (PBO) to peginterferon and ribavirin (PR) for treatment of chronic hepatitis C virus infection was examined using patient‐reported outcomes (PROs); further, concordance of PROs with virology endpoints and adverse events (AEs) was explored. Patients (= 768 SMV/PR,= 393 PBO/PR) rated fatigue (FSS), depressive symptoms (CES‐D) and functional impairment (WPAI: Hepatitis C Productivity, Daily Activity and Absenteeism) at baseline and throughout treatment in three randomised, double‐blind trials comparing the addition of SMV or PBO during initial 12 weeks of PR. PR was administered for 48 weeks (PBO group) and 24/48 weeks (SMV group) using a response‐guided therapy (RGT) approach. Mean PRO scores (except Absenteeism) worsened from baseline to Week 4 to the same extent in both groups but reverted after Week 24 for SMV/PR and only after Week 48 for PBO/PR. Accordingly, there was a significantly lower area under the curve (baseline–Week 60, AUC60) and fewer weeks with clinically important worsening of scores in the SMV/PR group at any time point. Incidences of patients with fatigue and anaemia AEs were similar in both groups, but FSS scores showed that clinically important increases in fatigue lasted a mean of 6.9 weeks longer with PBO/PR (P < 0.001). PRO score subgroup analysis indicated better outcomes for patients who met the criteria for RGT or achieved sustained virological response 12 weeks post‐treatment (SVR12); differences in mean PRO scores associated with fibrosis level were only observed with PBO/PR. Greater efficacy of SMV/PR enabled reduced treatment duration and reduced time with PR‐related AEs without adding to AE severity.  相似文献   
40.
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