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   20101篇
  免费   912篇
  国内免费   241篇
耳鼻咽喉   1496篇
儿科学   624篇
妇产科学   383篇
基础医学   1329篇
口腔科学   316篇
临床医学   2502篇
内科学   3500篇
皮肤病学   248篇
神经病学   797篇
特种医学   1220篇
外科学   2051篇
综合类   1731篇
一般理论   9篇
预防医学   2654篇
眼科学   287篇
药学   1359篇
  11篇
中国医学   351篇
肿瘤学   386篇
  2023年   217篇
  2022年   322篇
  2021年   664篇
  2020年   650篇
  2019年   1095篇
  2018年   959篇
  2017年   700篇
  2016年   552篇
  2015年   532篇
  2014年   1056篇
  2013年   1145篇
  2012年   873篇
  2011年   918篇
  2010年   801篇
  2009年   779篇
  2008年   741篇
  2007年   763篇
  2006年   679篇
  2005年   506篇
  2004年   382篇
  2003年   376篇
  2002年   283篇
  2001年   295篇
  2000年   239篇
  1999年   203篇
  1998年   158篇
  1997年   144篇
  1996年   112篇
  1995年   99篇
  1994年   139篇
  1993年   91篇
  1992年   84篇
  1991年   65篇
  1990年   68篇
  1989年   53篇
  1988年   59篇
  1986年   44篇
  1985年   325篇
  1984年   520篇
  1983年   425篇
  1982年   439篇
  1981年   357篇
  1980年   330篇
  1979年   403篇
  1978年   301篇
  1977年   201篇
  1976年   288篇
  1975年   254篇
  1974年   256篇
  1973年   244篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
ObjectivesSystematic review of the scientific literature dedicated to treatment modalities and results for aural tuberculosis published since the start of the 21st century.Material and methodsSearch of the Medline, Cochrane and Embase databases for the period 2000 - 2020. Selection of articles in English, French and Spanish devoted to clinical cases and series documenting treatment of auricular tuberculosis. Extraction of data on pre-established files documenting treatment modalities and results. Reading of articles by two authors. Analysis performed according to SWiM guidelines, evaluating cure, tuberculosis-related death, treatment-related complications, improvement in facial palsy, and hearing sequelae rates.ResultsOne hundred and twenty eight articles: 118 case reports (159 patients) and 10 cohorts (177 patients) from 42 countries were analyzed. Female/male sex ratio was 1.2 with ages ranging from 1 month to 87 years. Medical treatment consisted in 5 to 24 months’ antitubercular antibiotic treatment using 2 to 8 antibiotics. Mastoidectomy, tympanoplasty and facial nerve decompression were associated to medical treatment in 64.7%, 17.4% and 6.2% of cases, respectively. Overall rates of cure, death, treatment-related complications, facial sequelae and hearing sequelae were 96.8%, 2%, 9.5%, 35.8% and 75.5%. In case reports, BCG vaccination did not appear to protect against facial palsy and severe intracranial complications (P > 0.6). There was no significant correlation (P > 0.3) between death and the clinical variables tested, and facial nerve decompression did not appear to influence outcome for facial function (P = 0.4).ConclusionMedical treatment is very effective but not without risk of death, complications and sequelae. It is the same as for pulmonary tuberculosis. Indications for and benefit of major auricular surgery during medical treatment deserve further studies.  相似文献   
2.
ObjectivesTo review the evidence pertaining to the association between cow’s milk protein allergy and recurrent acute otitis media and otitis media with effusion.MethodsThe CENTRAL, Web of Science, EMBASE, MEDLINE, LILACS databases, and gray literature were searched.ResultsFour studies were included, identifying the prevalence rates: 0.2% of delayed speech due to chronic otitis media with effusion in 382 children with cow’s milk protein allergy, 10.7% of cow’s milk protein allergy in 242 children who underwent ENT procedures, 40% of cow’s milk protein allergy in 25 children with recurrent otitis media with effusion and higher tendency to otitis media in children with cow’s milk protein allergy of 186 children (1.5 + 0.6 vs. 0.4 + 0.1; p < 0.1).ConclusionConsidering the characteristics and methodological variations of the identified studies, it is not possible to state that there is reliable evidence of an association between cow’s milk protein allergy and otitis media.  相似文献   
3.
PurposeTo improve the efficiency and accuracy of clinicians documenting acute clinical events related to contrast agent administration using a web browser–based semistructured documentation support tool.MethodsA new tool called Contrast Incident Support and Reporting (CISaR) was developed to enable radiologists responding to contrast reactions to document inciting contrast class, type of event, severity of contrast reaction, and recommendation for future contrast use. Retrospective analysis was conducted of all CT and MRI examinations performed between February 2018 and December 2019 across our hospital system with associated contrast reaction documentation. Time periods were defined as before tool deployment, early adoption, and steady-state deployment. The primary outcome measure was the presence of event documentation by a radiologist. The secondary outcome measure was completeness of the documentation parameters.ResultsA total of 431 CT and MRI studies with reactions were included in the study, and 50% of studies had radiologist documentation during the pre-CISaR period. This increased to 66% during the early adoption period and 89% in the post-CISaR period. It took approximately 9 months from the introduction of CISaR to reach full adoption and become the main method for adverse contrast reaction documentation. The percentage of radiologist documentation that detailed provoking contrast agent class, severity of reaction, reaction type, and future contrast agent recommendation all significantly increased (P < .0001), with greater than 95% inclusion of each element.ConclusionThe implementation of a semistructured electronic application for adverse contrast reaction reporting significantly increased radiologist documentation rate and completeness of the documentation.  相似文献   
4.
为了实现超声对比剂(也称超声造影剂)高效、合理、安全、规范化输注,国内相关医护专家总结了国内外文献证据及临床经验,按照循证医学原则充分讨论后,制订了该共识,旨在为我国超声对比剂安全输注的规范化和标准化提供参考意见。共识介绍了超声对比剂的应用现状和安全性、相关法规与流程,造影前、中、后的规范化护理,并提出16条推荐意见。提出目前国内批准上市使用的超声对比剂安全性高,建议医护人员根据最新说明书或专家共识进行配药和给药,并从造影室管理、风险预案、人员资质等方面予以规范。  相似文献   
5.
6.
7.
8.
《Genetics in medicine》2022,24(9):1814-1820
Although still in the early stages of development, the advent of fast, high-output, and cost-effective next-generation DNA sequencing technology is moving precision medicine into public health. Before this shift toward next-generation sequencing in public health settings, individual patients met geneticists after showing symptoms and through limited family screening. In the new era of precision public health, everyone is a possible participant in genetic sequencing, simply by being born (newborn screening), by donating blood (biobanking), or through population screening. These initiatives are increasingly offered to individuals throughout their life and more individuals are encountering opportunities to use DNA sequencing. This article raises awareness of these growing areas and calls for different models of public engagement and communication about genomics, including screening asymptomatic populations, obtaining consent for unspecified and unforeseen future uses of genomic data, and managing variants of uncertain significance. Given that such communication challenges loom large, established norms of practice in genomic medicine and research should be reconsidered.  相似文献   
9.
本研究系统分析了中成药治疗新型冠状病毒肺炎临床研究方案注册信息,以提高相关临床研究设计质量,以及为中成药上市后评价提供参考和建议。对中国临床试验注册中心网站(www.chictr.org.cn)和美国临床试验注册中心网站(clinicaltrials.gov)进行检索,以新型肺炎、COVID-19、中成药等为检索词,检索新型冠状病毒肺炎中成药相关临床研究方案。按照纳排标准筛选临床研究,并提取注册号、研究题目、研究设计及类型、干预措施等数据,采用描述性分析方法对纳入研究的注册信息进行分析。共纳入新型冠状病毒肺炎中成药相关研究方案35个,其中涉及的8种中成药是新冠肺炎诊疗方案(第七版)中所推荐使用的药物。评价的干预措施共涉及23种中成药(如血必净注射液、喜炎平注射液、连花清瘟胶囊/颗粒等)。主要疗效指标以退热时间、疾病痊愈时间/有效率等为主。结果显示:中成药治疗新冠肺炎的临床研究响应快速,目前已注册多个临床研究,包括疾病诊治、预防全过程。但也存在问题,如研究人群不明确、评价指标代表性差等,相关研究设计和实施尚有待优化,以进一步提高临床试验研究的可行性,以期为当前和后续更多的临床研究方案提供参考。  相似文献   
10.
新型冠状病毒肺炎是感受新型冠状病毒所致,属于中医学“疫病”的范畴,其病因为吴又可提出的“异气”,与六淫不同,具有生物学属性;侵袭人体主要造成气阴损伤,气化失常,湿饮停聚;治疗当以“逐邪为第一要义”,恢复机体平衡状态。  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