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   1572篇
  免费   133篇
  国内免费   25篇
耳鼻咽喉   15篇
儿科学   52篇
妇产科学   35篇
基础医学   141篇
口腔科学   31篇
临床医学   162篇
内科学   317篇
皮肤病学   53篇
神经病学   110篇
特种医学   76篇
外科学   186篇
综合类   91篇
预防医学   144篇
眼科学   19篇
药学   115篇
  1篇
中国医学   51篇
肿瘤学   131篇
  2024年   11篇
  2023年   81篇
  2022年   191篇
  2021年   189篇
  2020年   160篇
  2019年   123篇
  2018年   105篇
  2017年   75篇
  2016年   50篇
  2015年   44篇
  2014年   107篇
  2013年   74篇
  2012年   51篇
  2011年   68篇
  2010年   40篇
  2009年   55篇
  2008年   51篇
  2007年   45篇
  2006年   29篇
  2005年   23篇
  2004年   22篇
  2003年   17篇
  2002年   7篇
  2001年   9篇
  2000年   11篇
  1999年   11篇
  1998年   8篇
  1997年   7篇
  1996年   9篇
  1995年   3篇
  1994年   6篇
  1993年   5篇
  1992年   6篇
  1991年   6篇
  1990年   4篇
  1989年   5篇
  1988年   3篇
  1987年   4篇
  1986年   1篇
  1985年   4篇
  1984年   4篇
  1983年   1篇
  1982年   1篇
  1981年   2篇
  1980年   1篇
  1978年   1篇
排序方式: 共有1730条查询结果,搜索用时 78 毫秒
91.
胰腺体外震波碎石术(pancreatic extracorporeal shock wave lithotripsy, P-ESWL)是治疗胰管结石的重要方法,其安全性和有效性已在临床实践中得到充分认可。但有关P-ESWL适应证、禁忌证、操作规范以及并发症防治等方面,国际与国内均尚未形成相关共识。为进一步规范我国P-ESWL的临床应用,由中国医师协会胰腺病学专业委员会及国家消化系统疾病临床医学研究中心(上海)牵头,在参考国内外P-ESWL相关研究基础上,结合国内临床应用经验,组织国内专家编写了本共识。该共识重点介绍了P-ESWL的设备、适应证、禁忌证、操作规范及并发症防治等,旨在提高相关专科医师对P-ESWL的认识,规范P-ESWL流程。  相似文献   
92.
Locust bean gum (LBG) is a galactomannan polysaccharide used as thickener in infant formulas with the therapeutic aim to treat uncomplicated gastroesophageal reflux (GER). Since its use in young infants below 12 weeks of age is not explicitly covered by the current scientific concept of the derivation of health based guidance values, the present integrated safety review aimed to compile all the relevant preclinical toxicological studies and to combine them with substantial evidence gathered from the clinical paediatric use as part of the weight of evidence supporting the safety in young infants below 12 weeks of age. LBG was demonstrated to have very low toxicity in preclinical studies mainly resulting from its indigestible nature leading to negligible systemic bioavailability and only possibly influencing tolerance. A standard therapeutic level of 0.5 g/100 mL in thickened infant formula is shown to confer a sufficiently protective Margin of Safety. LBG was not associated with any adverse toxic or nutritional effects in healthy term infants, while there are limited case-reports of possible adverse effects in preterms receiving the thickener inappropriately. Altogether, it can be concluded that LBG is safe for its intended therapeutic use in term-born infants to treat uncomplicated regurgitation from birth onwards.  相似文献   
93.
94.
95.
The Asian Pacific Association for the Study of the Liver (APASL) Working Party on Portal Hypertension has developed consensus guidelines on the disease profile, diagnosis, and management of noncirrhotic portal fibrosis and idiopathic portal hypertension. The consensus statements, prepared and deliberated at length by the experts in this field, were presented at the annual meeting of the APASL at Kyoto in March 2007. This article includes the statements approved by the APASL along with brief backgrounds of various aspects of the disease.  相似文献   
96.
目的 为全面评价县级妇幼保健机构服务能力确定其评价体系各指标的权重。方法 运用专家评分法和CRITIC 法分别求出评价指标的主观权重系数和客观权重系数,再求出综合权重系数。结果 综合权重系数最小为0.0334,最大为0.0504,其中指标开放床位数(X6)、万元以上设备数(X7)、财政补助收入占总收入比例(X12)、年门急诊人次数(X21)和年住院人次数(X22)的综合权重系数较小;而指标次均住院天数(X9)、医疗支出占总支出的比例(X13)、孕产妇死亡率(X18)、出入院诊断符合率(X19)和次均门诊费用(X25)的综合权重系数较大。结论 本研究确立的服务能力评价指标权重系数,在通过医疗效益对县级妇幼保健机构进行评价的同时,也更加注重对其公共卫生服务的考核,符合当前医疗发展趋势。主观赋权法和客观赋权法相结合求指标权重系数,结果更加科学、合理。  相似文献   
97.
BackgroundThe risks from potential exposure to coronavirus disease 2019 (COVID-19), and resource reallocation that has occurred to combat the pandemic, have altered the balance of benefits and harms that informed current (pre-COVID-19) guideline recommendations for lung cancer screening and lung nodule evaluation. Consensus statements were developed to guide clinicians managing lung cancer screening programs and patients with lung nodules during the COVID-19 pandemic.MethodsAn expert panel of 24 members, including pulmonologists (n = 17), thoracic radiologists (n = 5), and thoracic surgeons (n = 2), was formed. The panel was provided with an overview of current evidence, summarized by recent guidelines related to lung cancer screening and lung nodule evaluation. The panel was convened by video teleconference to discuss and then vote on statements related to 12 common clinical scenarios. A predefined threshold of 70% of panel members voting agree or strongly agree was used to determine if there was a consensus for each statement. Items that may influence decisions were listed as notes to be considered for each scenario.ResultsTwelve statements related to baseline and annual lung cancer screening (n = 2), surveillance of a previously detected lung nodule (n = 5), evaluation of intermediate and high-risk lung nodules (n = 4), and management of clinical stage I non–small-cell lung cancer (n = 1) were developed and modified. All 12 statements were confirmed as consensus statements according to the voting results. The consensus statements provide guidance about situations in which it was believed to be appropriate to delay screening, defer surveillance imaging of lung nodules, and minimize nonurgent interventions during the evaluation of lung nodules and stage I non–small-cell lung cancer.ConclusionsThere was consensus that during the COVID-19 pandemic, it is appropriate to defer enrollment in lung cancer screening and modify the evaluation of lung nodules due to the added risks from potential exposure and the need for resource reallocation. There are multiple local, regional, and patient-related factors that should be considered when applying these statements to individual patient care.  相似文献   
98.
目的 探讨应用阿达木单克隆抗体(简称“单抗”)治疗强直性脊柱炎致播散性结核病的临床特点、诊治要点和治疗转归。 方法 回顾性分析福建省福州肺科医院2019年6月10日收治的1例应用阿达木单抗治疗强直性脊柱炎致播散性结核病的临床资料、诊治经过及随访情况,并进行文献复习。以“adalimumab”和“disseminated tuberculosis”为检索词对PubMed数据库进行检索,以“阿达木单抗”和“播散性结核病”为检索词通过万方数据库和中国知网对中文文献进行检索,检索时间截止到2019年9月,经过筛选剔除,共获取相关文献34篇,其中中文文献0篇,英文文献34篇。删去重复的文献并剔除可能为阿达木单抗以外的肿瘤坏死因子α(TNF-α)致播散性结核病及TNF-α致其他播散性疾病的报道,共筛选出具备详细病例资料的文献8篇,共获得8例患者,结合本研究收集的患者,对其临床特征、诊断和治疗情况进行分析。 结果 本例患者为男性,28岁。因“强直性脊柱炎”接受阿达木单抗治疗,治疗2个月后出现咳嗽、气促、腹胀、发热,入院后经胸部CT、胸膜活检及支气管镜等检查,诊断为“播散性结核病(双肺、右侧支气管、胸腔、腹腔、心包、纵隔淋巴结、锁骨上淋巴结、腹腔淋巴结、盆腔淋巴结、脾)”。给予“3H-R-Z-E/9H-R-E”方案治疗,辅以异烟肼支气管局部雾化吸入,行抗结核药物治疗后症状改善。治疗第5个月,CT复查提示“肺部病变减少,纵隔内部分淋巴结肿大较前缩小,增厚的支气管管壁较前变薄,管腔较前通畅,胸、腹腔积液明显吸收。截止到2019年12月,患者仍处于规则的抗结核药物治疗中。文献检索后获得8例患者,加上本例,共9例患者。其中,男3例,女6例;年龄9~75岁,平均年龄(50.44±25.19)岁。9例患者中,5例开始使用阿达木单抗治疗之前的结核病筛查试验结果为阴性,1例既往有抗结核治疗史,1例曾进行过预防性抗结核治疗,3例有与结核病患者的密切接触史。诊断明确行抗结核药物治疗后,5例患者转归良好。3例转归差,其中1例病情持续进展,并发消化道出血;1例颅内病灶持续进展;1例出现急性呼吸窘迫综合征,最终死亡。1例转归不明。 结论 阿达木单抗可致播散性结核病,准备接受阿达木单抗治疗的患者均应在用药前进行结核病筛查,治疗过程中应该警惕潜伏性结核感染转为活动性结核病及新发结核感染,停用阿达木单抗和及时行抗结核药物治疗是预后良好的关键。  相似文献   
99.
Health care professionals responsible for patients with complex wounds need a particular level of expertise and education to ensure optimum wound care. However, uniform education for those working as wound care nurses is lacking. We aimed to reach consensus among experts from six European countries as to the competencies for specialised wound care nurses that meet international professional expectations and educational systems. Wound care experts including doctors, wound care nurses, lecturers, managers and head nurses were invited to contribute to an e‐Delphi study. They completed online questionnaires based on the Canadian Medical Education Directives for Specialists framework. Suggested competencies were rated on a 9‐point Likert scale. Consensus was defined as an agreement of at least 75% for each competence. Response rates ranged from 62% (round 1) to 86% (rounds 2 and 3). The experts reached consensus on 77 (80%) competences. Most competencies chosen belonged to the domain ‘scholar’ (n = 19), whereas few addressed those associated with being a ‘health advocate’ (n = 7). Competencies related to professional knowledge and expertise, ethical integrity and patient commitment were considered most important. This consensus on core competencies for specialised wound care nurses may help achieve a more uniform definition and education for specialised wound care nurses.  相似文献   
100.
Recent global debates on the research and development (R&D) of health technologies, such as drugs, diagnostics and vaccines, can be seen as a microcosm of discussions on the role of the World Health Organization (WHO) in the global health system more broadly. The global R&D system has come under heightened scrutiny with the publication of a 2012 report by the WHO Consultative Expert Working Group on Research and Development (CEWG), which made a number of recommendations to more equitably meet global health needs. The CEWG report followed a decade-long process of debate at the WHO on the weaknesses of the global R&D system, which include problems of affordability, limited research where market returns are small or uncertain (such as the ‘neglected diseases’ that predominantly affect the world's poorest), inefficient overlap of research efforts, and overuse of medicines such as antibiotics. The CEWG report called on WHO Member States to develop a global framework to improve monitoring, coordination and financing of R&D efforts through the establishment of a Global Health R&D Observatory and the negotiation of a binding treaty on R&D. While the treaty option has been put on the back-burner for several years, Member States nevertheless agreed at the 2013 World Health Assembly (WHA) on concrete steps towards a global framework. Progress at the 2013 WHA reaffirmed the central role of WHO as a convener, and the WHA's decision to create the Observatory within the WHO Secretariat underscored the organization's role as a source of strategic knowledge in the global health system. However, despite WHO's constitutional mandate as the ‘directing and coordinating authority on international health work’, in reality it faces major challenges in coordinating autonomous R&D actors such as states, firms and foundations in the global system. Strengthening its ability to do so requires, at a minimum, reforming its financing arrangements to provide it with a greater degree of independence from its largest donors. In addition, WHO may seem to be the natural arena for negotiating a binding R&D treaty, but negotiating new global agreements in other arenas such as the WTO, WIPO, or plurilateral fora offer the possibility of more enforceable and stronger public health norms. Nevertheless, no single arena in the existing system of global governance is perfectly suitable for the negotiation of progressive, inclusive, binding, enforceable, global health rules. While tradeoffs are inherent in the choice of any particular arena, leadership from either the multilateral institutions or influential governments can make a key difference in how beneficial any R&D treaty may be for health. In the coming years, global R&D debates will remain a critical issue to watch. The evolution of the global R&D system will be a harbinger not only of WHO's place in a rapidly-changing global health system, but also of our collective capacity to strengthen institutions of global governance for health.  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