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   69360篇
  免费   4405篇
  国内免费   890篇
耳鼻咽喉   298篇
儿科学   911篇
妇产科学   1056篇
基础医学   3689篇
口腔科学   1723篇
临床医学   14185篇
内科学   12049篇
皮肤病学   546篇
神经病学   1386篇
特种医学   949篇
外科学   4531篇
综合类   12704篇
一般理论   36篇
预防医学   11768篇
眼科学   509篇
药学   4953篇
  546篇
中国医学   2185篇
肿瘤学   631篇
  2024年   46篇
  2023年   1168篇
  2022年   1934篇
  2021年   2863篇
  2020年   2811篇
  2019年   2260篇
  2018年   2360篇
  2017年   2110篇
  2016年   2150篇
  2015年   2130篇
  2014年   5275篇
  2013年   5573篇
  2012年   4741篇
  2011年   5176篇
  2010年   3937篇
  2009年   3846篇
  2008年   3848篇
  2007年   3947篇
  2006年   3441篇
  2005年   2566篇
  2004年   2048篇
  2003年   1627篇
  2002年   1210篇
  2001年   1068篇
  2000年   912篇
  1999年   748篇
  1998年   563篇
  1997年   467篇
  1996年   392篇
  1995年   413篇
  1994年   334篇
  1993年   284篇
  1992年   287篇
  1991年   260篇
  1990年   240篇
  1989年   225篇
  1988年   223篇
  1987年   175篇
  1986年   116篇
  1985年   177篇
  1984年   104篇
  1983年   65篇
  1982年   84篇
  1981年   70篇
  1980年   62篇
  1979年   46篇
  1978年   48篇
  1977年   38篇
  1976年   27篇
  1973年   24篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
《Journal of endodontics》2022,48(2):208-212.e3
IntroductionDiabetes mellitus (DM) is a complex multisystemic disorder that affects an estimated 21 million Americans. No studies have evaluated the association of DM with the prevalence of each pulpal diagnosis. The objective of this study was to compare the prevalence of each pulp diagnosis including symptomatic irreversible pulpitis (SIP), asymptomatic irreversible pulpitis, reversible pulpitis, normal pulp, and pulp necrosis (PN) in DM patients against a nondiabetic control group.MethodsA retrospective chart review was approved by Rutgers University Institutional Review Board. The prevalence of the diagnoses SIP, asymptomatic irreversible pulpitis, reversible pulpitis, normal pulp, and PN was calculated from AxiUm (Exan software, Las Vegas, NV) electronic health records at Rutgers School of Dental Medicine. The chi-square test was used to see the relationship between the 2 categoric variables. Second, binary logistic regression analyses were performed for each group.ResultsA total of 2979 teeth were diagnosed with a pulp condition between April 2013 and November 2018. The total tooth number of DM patients was 682, whereas the tooth number of nondiabetic patients was 2297. In the subgroup of patients younger than 40 years old, SIP was notably more prevalent in DM patients. In addition, the prevalence of PN in elderly DM patients (60–69 years old) was significantly higher than in the control group.ConclusionsThe prevalence of SIP in DM patients was significantly higher compared with the control group (<40 years old), suggesting the possibility that DM could hypersensitize the subgroup of patients younger than 40 years old to pulpitis pain.  相似文献   
6.
7.
8.
BackgroundOverweight and obesity have been observed in children with type 1 diabetes (T1D). This further increases their future risk of Cardiovascular Disease (CVD) as well as the development of other risk factors, such as dyslipidemia.AimsTo compare lipid profiles in children and adolescents with Type 1 diabetes and lean mass (T1L), Type 1 diabetes and overweight or obese (T1OW/OB), and type 2 diabetes (T2D).MethodsThis was a cross-sectional study of 669 patients with T1D or T2D aged 2–19 years using retrospective data collected from 2003 to 2014. Included patients were categorized into lean (BMI < 85th ile and overweight or Obese (BMI ≥ 85th ile). Patients were subcategorized into three age groups: < 10 years, 10–14 years, and 15–19 years.Results7.6% of patients had T2D. Of the patients with T1D, 58.9% were lean, 26.4% were overweight, and 14.7% were obese. Total Cholesterol (TC), Low-density lipoprotein cholesterol (LDL-C) and Non-HDL-C levels were similar across groups. In the 15–19 years group, Triglycerides (TG) levels were significantly higher in T1OW/OB and similar to T2D. High-density lipoprotein Cholesterol (HDL-C) was significantly lower in T2D. Weight status significantly correlated with TG and HDL-C levels in T1D and T2D groups.ConclusionsT1OW/OB constitutes a significant proportion of the T1D population. Patients with obesity and T1D, especially if in their late adolescence, have an adverse lipid profile pattern that is comparable to adolescents with T2D. Based on these findings, risk for future CVD in T1OW/OB and T2D may be equivalent.  相似文献   
9.
10.
目的探索输血医学在线继续教育新模式,发挥继续教育对于学科可持续发展的促进作用。方法利用在线网络平台创建中国输血大讲堂,以在线直播专题讲座的方式将输血医学相关的基础与临床研究新进展传递给全国的一线工作人员。通过问卷星软件系统进行匿名网络问卷调查,了解大讲堂观众人群构成以及对课程设置和讲课效果的评价情况。结果过去四年多已完成166期、249个学时的网络授课,超过6.3万人次收看了直播讲座。问卷调查共回收有效问卷1266份,讲座内容安排满意度评分(S1)≥90、80≤S1<90和70≤S1<80分别占61.45%、30.88%和5.85%;整体师资能力水平满意度(S2)≥90、80≤S2<90和70≤S2<80分别占68.01%、25.91%和5.06%;讲课效果包括提高临床实际处理问题的能力(89.02%)、增强基础理论水平(84.36%)、完善对输血医学学科整体认识(83.89%)、开拓学科视野(81.04%)、有助于改善与临床之间的协作关系(64.14%)和锻炼临床思维(63.35%)。结论中国输血大讲堂这种网络在线继续教育模式,可以有效地克服时间、空间的限制,为广大输血从业人员提供便捷、系统的知识更新渠道,受众人群在基础知识、基本理论、基本技能等方面得到不同程度的提高。  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