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   1235218篇
  免费   89263篇
  国内免费   12321篇
耳鼻咽喉   16680篇
儿科学   36801篇
妇产科学   29962篇
基础医学   168192篇
口腔科学   32388篇
临床医学   114867篇
内科学   223600篇
皮肤病学   26285篇
神经病学   87821篇
特种医学   49100篇
外国民族医学   269篇
外科学   179692篇
综合类   57247篇
现状与发展   50篇
一般理论   272篇
预防医学   88505篇
眼科学   28148篇
药学   103370篇
  194篇
中国医学   15396篇
肿瘤学   77963篇
  2022年   9229篇
  2021年   15181篇
  2020年   11117篇
  2019年   12354篇
  2018年   16335篇
  2017年   14058篇
  2016年   14940篇
  2015年   18982篇
  2014年   24665篇
  2013年   32005篇
  2012年   44669篇
  2011年   47464篇
  2010年   30469篇
  2009年   27434篇
  2008年   40693篇
  2007年   42348篇
  2006年   42326篇
  2005年   39198篇
  2004年   35503篇
  2003年   33992篇
  2002年   31999篇
  2001年   63379篇
  2000年   64024篇
  1999年   52876篇
  1998年   13589篇
  1997年   12090篇
  1996年   11873篇
  1995年   11096篇
  1994年   9927篇
  1993年   9224篇
  1992年   38160篇
  1991年   36571篇
  1990年   36022篇
  1989年   34502篇
  1988年   31043篇
  1987年   30154篇
  1986年   28336篇
  1985年   26542篇
  1984年   19233篇
  1983年   16153篇
  1979年   17069篇
  1978年   11419篇
  1977年   10246篇
  1975年   10079篇
  1974年   11671篇
  1973年   11300篇
  1972年   10761篇
  1971年   10100篇
  1970年   9261篇
  1969年   8942篇
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
41.
42.
43.
Behçet disease is a complex, multisystem disease characterized by recurrent oral and genital ulcerations. It rarely occurs in infants or children. Neonatal Behçet disease has been reported in infants whose ulcers resolve at or before 9 weeks of age. Few cases of neonatal Behçet disease persisting into childhood have previously been reported. We report the case of a 1‐month‐old infant who presented with severe recurrent genital ulcerations and at 6 months developed recurrent oral ulcerations. Her orogenital ulcerations continue to recur. Human leukocyte antigen testing revealed HLA‐B51 and B44 positivity. This is a case of pediatric Behçet disease in the neonatal period. Behçet disease should be considered in the differential diagnosis of recurrent genital and oral ulcerations in infants and children.  相似文献   
44.
45.
目的 探讨快速康复外科 (FTS)理念在经后颅窝乙状窦后入路三叉神经微血管减压术围术期患者护理中的应用效果。方法 选择2018年1月~2019年1月我院收治并行经后颅窝乙状窦后入路三叉神经微血管减压患者100例,随机分成观察组和对照组,每组50例。对照组应用常规方法进行围术期护理,观察组应用FTS理念进行围术期护理。比较两组焦虑情况、术后并发症发生率、平均住院日及平均住院费用。结果 观察组轻度焦虑多于对照组,中、重度焦虑少于对照组(P<0.05);观察组术后并发症发生率低于对照组[恶心呕吐(4.00% vs 16.00%)、尿路感染(4.00% vs 18.00%)、颅内感染(0 vs 8.00%)、颅内血肿(2.00% vs 14.00%)和术后应激性疼痛(16.00% vs 34.00%)],差异有统计学意义(P<0.05);观察组平均住院日和平均住院费用均低于对照组[(9.13±1.14)d vs(12.44±0.89)d];[(2.15±0.66)万元 vs (3.05±0.61)万元],差异有统计学意义(P<0.05)。结论 应用FTS理念能缓解经后颅窝乙状窦后入路三叉神经微血管减压术患者术前紧张恐惧的心理,减少术后并发症,缩短患者住院日,降低住院费用,护理效果较好。  相似文献   
46.
BackgroundSecond-hand smoking or environmental tobacco smoke is a critical health risk. Children are the most vulnerable to second-hand smoking because of their small bronchial ducts, less developed immunity, and low-physical activity.ObjectivesThe purpose of this study was to ascertain the effects of second-hand smoking on lung functions in athlete and non-athlete school-aged children.MethodsThis observational study included forty-six school-aged children, their age was 8–15 years, assigned to three groups; 2 study groups and 1 control group (n=15). The study groups comprised of 16 football players, and of 15 cyclists. Lung functions were evaluated recording forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow using digital spirometer.ResultsAll measures were recorded in definite values and the children were also classified into second-hand smoking (SH), or non-exposed to tobacco smoking (NE). The findings presented a significant increase (p<0.05) of the study groups in forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow solely for the non-exposed children. However, there were non-significant differences between the cyclists and football players or between the passive smoking children and non-exposed children in any of the two study groups (p>0.05).ConclusionThe outcomes of this study suggest beneficial influences of the sports activity on the lung functions, without different influences of the cyclists and football players on the lung functions.  相似文献   
47.
48.
As millions of people turn to social media for health information, better understanding the factors that guide health-related judgments and perceptions in this context is imperative. We report on two Web experiments (n > 400 total) examining the power of society’s widespread weight bias and related stereotypes to influence nutrition judgments in social media spaces. In Experiment 1, meals were judged as lower in nutritional quality when the person who recommended them (the source) was depicted as obese rather than of normal weight, an effect mediated by stereotypic beliefs about the source as a generally unhealthy person. Experiment 2 replicated this effect, which—notably—remained significant when controlling for objective nutritional information (calories and fat content). Results highlight spillover effects of weight bias that extend beyond person perception to color impressions of objects (here, food) that are associated with stigmatized attributes. Implications for everyday nutrition judgments and public health are considered.  相似文献   
49.
50.
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