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   83743篇
  免费   6896篇
  国内免费   1685篇
耳鼻咽喉   731篇
儿科学   1942篇
妇产科学   1170篇
基础医学   3452篇
口腔科学   4525篇
临床医学   7850篇
内科学   9881篇
皮肤病学   1519篇
神经病学   5139篇
特种医学   2063篇
外国民族医学   21篇
外科学   8775篇
综合类   14934篇
现状与发展   9篇
一般理论   4篇
预防医学   5875篇
眼科学   1493篇
药学   8165篇
  155篇
中国医学   8835篇
肿瘤学   5786篇
  2024年   188篇
  2023年   1341篇
  2022年   1933篇
  2021年   3426篇
  2020年   3664篇
  2019年   2821篇
  2018年   2665篇
  2017年   2950篇
  2016年   3223篇
  2015年   2959篇
  2014年   5817篇
  2013年   7972篇
  2012年   5694篇
  2011年   5998篇
  2010年   5044篇
  2009年   4361篇
  2008年   3831篇
  2007年   4074篇
  2006年   3641篇
  2005年   3108篇
  2004年   2594篇
  2003年   2264篇
  2002年   1884篇
  2001年   1530篇
  2000年   1304篇
  1999年   1022篇
  1998年   843篇
  1997年   775篇
  1996年   637篇
  1995年   564篇
  1994年   524篇
  1993年   454篇
  1992年   369篇
  1991年   332篇
  1990年   241篇
  1989年   249篇
  1988年   226篇
  1987年   213篇
  1986年   195篇
  1985年   246篇
  1984年   194篇
  1983年   132篇
  1982年   173篇
  1981年   135篇
  1980年   121篇
  1979年   111篇
  1978年   63篇
  1977年   58篇
  1976年   46篇
  1975年   28篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital condition. It responds well to early diagnosis and treatment, but otherwise the prognosis is poor. We present our case series of 12 patients (mean age, 2 ± 2.58 yr; age range, 2 mo–8 yr), emphasizing the diagnostic process and discussing our surgical results. The diagnosis of ALCAPA should be suspected in infants who have dilated cardiomyopathy with electrocardiographic changes that suggest ischemia, and in older children who have isolated mitral regurgitation. When clinical suspicion is high, the results of 2-dimensional echocardiography combined with color-flow Doppler studies in expert hands can establish the diagnosis, thus avoiding angiography in critically ill infants. The treatment of choice in our patients was transfer and reimplantation of the left coronary artery onto the ascending aorta. There were 2 deaths: both were infants in extremis who underwent emergency surgery. An older child with severe ventricular dysfunction was given mechanical ventricular assistance and then heart transplantation. As of this report, all 10 survivors remained well and asymptomatic.  相似文献   
32.
目的 对比LEEP刀与微波治疗慢性宫颈炎的临床效果.方法 随机选取2013年10月—2015年4月期间,到该院就诊的70例慢性宫颈炎患者为研究对象,在取得患者同意的前提下,随机将患者均分为对照组(采用微波治疗)和观察组(采用LEEP刀治疗),两组患者的人数均为35例,观察并比较两组患者的手术情况、治疗效果等指标. 结果 ①观察组患者的手术时间、阴道流液时间、术中出血量均优于对照组,两组差异有统计学意义(P<0.05);②观察组患者的治疗总有效率为97.14%(34/35),对照组为82.86%(29/35),两组差异有统计学意义(P<0.05).结论 在慢性宫颈炎的治疗中,与传统微波治疗相比,LEEP刀治疗的效果更佳,值得临床推广.  相似文献   
33.
Introduction: Effective treatment of rheumatoid arthritis (RA) requires suppression of the underlying inflammation. Measurement of such inflammation, the disease activity, is mandatory to target treatment and maximize outcomes. However, this is not as straightforward as it may seem.

Areas covered: The many tools developed to measure disease activity in RA, from composite scores and patient-reported outcomes, to laboratory markers and imaging are discussed, with a focus on their utility in guiding therapy and assessing response. The complex issues in measuring disease activity in RA, whether in clinical trials or normal clinical practice, and in the context of national guidelines and recommendations, available time, and resources are considered.

Expert commentary: The key to effective management of RA is the rapid suppression of inflammation, ideally to remission, with maintenance of such remission. The aim is to prevent disability and maximize quality of life. Central to this is the ability to determine disease activity (potentially open to suppression) as opposed to damage (irreversible). A variety of measures are currently available, allowing better assessment of response to treatment. In the future, the development of predictive biomarkers allowing targeting of drugs may revolutionize this field and render the tools of today redundant.  相似文献   

34.
肠易激综合征(IBS)是一种常见的功能性疾病,中医病名为"肠郁"。郭朋教授根据IBS生理、病理特点,以疏肝健脾法调和肝脾,辨证施治,取得良好疗效。文章从病因病机、辨证论治及经典案例介绍等几个方面对郭教授治疗IBS经验进行系统阐述,以期为中医药治疗IBS提供理论和方法学参考。  相似文献   
35.
经脉包括经(气)络和血(脉)络,清代周学海《读医随笔》将气络末端称为"气之细络",脉络末端称为"血之细络"。心之气络涵盖心脏起搏与传导系统等广泛调控机制,心之脉络涵盖冠状动脉循环系统,心之气络与脉络相互协调,营卫相偕而行,共同维持心脏正常功能。各种致病因素导致营卫异常而发为心律失常,基于脉络学说营卫理论"损其心者,调其营卫"(《难经·十四难》)治疗原则指导心律失常辨证论治,同时充分结合现代致病因素和致病特点,分别选用调节卫气营血之方药,标本兼治,以期为临床诊疗提供有益借鉴。  相似文献   
36.
笔者根据现代临床子宫内膜的病理演变过程结合中医“异病同治”理念,提出“子宫内膜功能亢进性疾病”概念,涵盖5种常见的子宫内膜疾病:无排卵性异常子宫出血(Abnormal Uterine Bleeding Ovulatory dysfunction,AUB-O),子宫内膜息肉(Endometrial Polyp,EP),子宫内膜异位症(Endometriosis,EMs),子宫腺肌病(Adenomyosis,AM),子宫内膜癌(Endometrial Carcinoma,EC)。基于文献的汇总,分析得到此类疾病的子宫内膜病理演变与中医病因病机的关联性,为寻找关键通路、创新性治疗此类疾病提供了重要的参考方向,对深化中医妇科学常见疾病的共性病因病机提供了理论依据和探索思路。  相似文献   
37.
刘士鑫  吴瑾 《现代肿瘤医学》2022,(18):3423-3428
卵巢癌是妇科肿瘤领域内的一个热点主题。该种恶性肿瘤疾病的发病率高且隐匿,缺乏有效的早期发现及时诊断并治疗的方式,病情容易加重发生远处转移。因此罹患卵巢癌的女性5年生存率比较低。外泌体属于一类典型的囊性泡样的小体,参与肿瘤的发病及转移机制且在肿瘤疾病的治疗中起着重要作用。本篇综述主要介绍癌细胞外泌体在卵巢恶性肿瘤疾病的诊断、转移及治疗中的研究现状。  相似文献   
38.
《Molecular therapy》2022,30(5):1952-1965
  1. Download : Download high-res image (199KB)
  2. Download : Download full-size image
  相似文献   
39.
Objective: Several biologic therapies are available for the treatment of mild-to-moderate Crohn’s disease (CD). This network meta-analysis (NMA) aimed to assess the comparative efficacy of ustekinumab, adalimumab, vedolizumab and infliximab in the maintenance of clinical response and remission after 1?year of treatment.

Methods: A systematic literature search was performed to identify relevant randomized controlled trials (RCTs). Key outcomes of interest were clinical response (CD activity index [CDAI] reduction of 100 points; CDAI-100) and remission (CDAI score under 150 points; CDAI < 150). A treatment sequence Bayesian NMA was conducted to account for the re-randomization of patients based on different clinical definitions, the lack of similarity of the common comparator for each trial and the full treatment pathway from the induction phase onwards.

Results: Thirteen RCTs were identified. Ustekinumab 90?mg q8w was associated with statistically significant improvement in clinical response relative to placebo and vedolizumab 300?mg. For clinical remission, ustekinumab 90?mg q8w was associated with statistically significant improvement relative to placebo and vedolizumab 300?mg q8w. Findings from sub-population analyses had similar results but were not statistically significant.

Conclusions: The NMA suggest that ustekinumab is associated with the highest likelihood of reaching response or remission at 1?year compared with placebo, adalimumab and vedolizumab. Results should be interpreted with caution because this is a novel methodology; however, the treatment sequence analysis may be the most methodologically sound analysis to derive estimates of comparative efficacy in CD in the absence of head-to-head evidence.  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