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   49741篇
  免费   2149篇
  国内免费   526篇
耳鼻咽喉   1213篇
儿科学   497篇
妇产科学   570篇
基础医学   2457篇
口腔科学   4908篇
临床医学   1970篇
内科学   1124篇
皮肤病学   2094篇
神经病学   744篇
特种医学   891篇
外国民族医学   3篇
外科学   30760篇
综合类   1620篇
现状与发展   1篇
一般理论   4篇
预防医学   419篇
眼科学   656篇
药学   581篇
  6篇
中国医学   39篇
肿瘤学   1859篇
  2024年   35篇
  2023年   1628篇
  2022年   2675篇
  2021年   2495篇
  2020年   2986篇
  2019年   1684篇
  2018年   1667篇
  2017年   1463篇
  2016年   1582篇
  2015年   1511篇
  2014年   3443篇
  2013年   3083篇
  2012年   3095篇
  2011年   2842篇
  2010年   2605篇
  2009年   2317篇
  2008年   1925篇
  2007年   1902篇
  2006年   1707篇
  2005年   1478篇
  2004年   1248篇
  2003年   1158篇
  2002年   1044篇
  2001年   972篇
  2000年   890篇
  1999年   860篇
  1998年   454篇
  1997年   379篇
  1996年   284篇
  1995年   154篇
  1994年   156篇
  1993年   103篇
  1992年   391篇
  1991年   362篇
  1990年   372篇
  1989年   323篇
  1988年   278篇
  1987年   148篇
  1986年   76篇
  1985年   71篇
  1984年   75篇
  1983年   58篇
  1982年   56篇
  1981年   52篇
  1980年   57篇
  1979年   48篇
  1978年   48篇
  1977年   46篇
  1976年   34篇
  1975年   30篇
排序方式: 共有10000条查询结果,搜索用时 218 毫秒
1.
2.
3.
The purpose of this study was to investigate the association between habitual snoring (HS), middle ear disease (MED), and speech problems in children with cleft palate. This cross-sectional study included children aged 2.0–7.9 years with non-syndromic cleft palate anomalies. Parents completed the Pediatric Sleep Questionnaire and a questionnaire about MED. Audiograms and speech assessment were also conducted. Ninety-five children were enrolled; 15.2% of families reported HS, 97.6% MED, and 17.1% speech problems. HS (37.5% vs 10.3%, P = 0.007) and early episodes of MED (92.3% vs 58.2%, P = 0.021) were more likely to be reported for children with isolated cleft palate when compared to those with cleft lip and palate. Children with cleft lip and palate had a higher frequency of MED with effusion compared to those with Robin sequence (86.4% vs 57.1%, P = 0.049). The odds ratio for HS in children with ≥1 episode of MED in the last year was 7.37 (95% confidence interval 1.55–35.15, P = 0.012). There was a trend for children with speech problems reported by parents to have HS (30.8% vs 11.5%, P= 0.076). Anatomical factors play a role in the frequency of upper airway symptoms in children with cleft palate. A recent history of at least one episode of MED was associated with an increased frequency of HS.  相似文献   
4.
5.
European Surgery - Large skin defects caused by trauma (e.g., burns) or due to other reasons (e.g., tumor-related skin resections) require sufficient skin replacement. The constant improvement of...  相似文献   
6.
BackgroundNecrotising myositis (NM) is a life-threatening emergency. Prompt treatment is associated with more favourable outcomes, but early diagnosis is challenging. The initial absence of cutaneous signs and symptoms coupled with delayed recognition commonly result in higher rates of morbidity and mortality.ObjectivesAnalyse data regarding demographics, epidemiology, aetiology, clinical manifestations, diagnosis and treatment of previously reported cases. This publication is intended for plastic surgeons in training to help them look out for this disease.Search methods/criteriaPublications reporting necrotising myositis between 1974 to January 2020 were identified from Embase, Medline All, Web of Science Core Collection, Google Scholar and Cochrane Central Register of Controlled Trial.Data collection and analysis: Identified studies were exported to an end note library. In animal studies, studies relating to statin-induced myotoxicity and auto-immune myositis were excluded. The quality of included case reports was assessed using JBI Critical Appraisal Checklist for Case Reports.Main resultsThe most common initial presentation was a few days of antecedent prodromal flu-like symptoms associated with muscle pain. The mean age was 43.3 years and 82% had no significant medical history. The most frequent misdiagnoses were muscle strain (11%), deep vein thrombosis (10%) and viral illness (9%). Seventy-four per cent of presentations were due to Group A Streptococcus infections and only 3.5% of cases were polymicrobial. The most common clinical course following the initial presentation was rapid deterioration into profound sepsis and progression into multi-organ failure. The overall mortality rate was 36.5%.ConclusionsNM is a life-threatening muscle infection. It is a diagnostic conundrum as initial presentation is often only myalgia without features of preceding trauma. We propose that a high index of suspicion and increased awareness will reduce morbidity.OtherPROSPERO (registration number CRD42018087060). Nil funding/conflict of interest.  相似文献   
7.
8.
9.
AimsWe examined the impact of memory complaints on the concordance between self-report (SR) and electronically monitored (EM) medication adherence, independent of depression symptoms, among adults with type 2 diabetes (T2D).MethodsAdults (N = 104, age = 56.6 ± 9.2; 64% female) completed a prospective and retrospective memory questionnaire (PRMQ) and a depression symptom interview at baseline. EM was tracked over 3 months and participants rated adherence using SR. Multiple linear regression evaluated PRMQ as a moderator of the relationship between EM and SR, adjusting for depression and other covariates.ResultsPRMQ was correlated with lower SR (r = ?0.31, p = 0.001), but not with EM. PRMQ moderated the relationship between SR and EM, independent of depression symptoms. At low levels of PRMQ, SR and EM were closely related (β = 0.76, p < 0.001); at high levels of PRMQ the relationship was weaker (β = 0.28, p = 0.02). Participants who under-reported their adherence (SR < EM) had higher PRMQ scores than more concordant reporters (p = 0.016).ConclusionsSR and EM measures were less concordant among adults with T2D who endorsed higher PRMQ scores. Memory complaints may contribute to under-reporting of medication adherence in adults with T2D.  相似文献   
10.
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