全文获取类型
收费全文 | 732748篇 |
免费 | 50355篇 |
国内免费 | 17347篇 |
专业分类
耳鼻咽喉 | 9826篇 |
儿科学 | 22705篇 |
妇产科学 | 11645篇 |
基础医学 | 56068篇 |
口腔科学 | 16911篇 |
临床医学 | 82629篇 |
内科学 | 94497篇 |
皮肤病学 | 9225篇 |
神经病学 | 38676篇 |
特种医学 | 24196篇 |
外国民族医学 | 59篇 |
外科学 | 83804篇 |
综合类 | 100834篇 |
现状与发展 | 41篇 |
一般理论 | 56篇 |
预防医学 | 84735篇 |
眼科学 | 10864篇 |
药学 | 69989篇 |
720篇 | |
中国医学 | 51312篇 |
肿瘤学 | 31658篇 |
出版年
2023年 | 10398篇 |
2022年 | 21223篇 |
2021年 | 31854篇 |
2020年 | 26249篇 |
2019年 | 31030篇 |
2018年 | 27252篇 |
2017年 | 24269篇 |
2016年 | 24261篇 |
2015年 | 26148篇 |
2014年 | 50635篇 |
2013年 | 50326篇 |
2012年 | 48333篇 |
2011年 | 47719篇 |
2010年 | 40307篇 |
2009年 | 37407篇 |
2008年 | 35161篇 |
2007年 | 35745篇 |
2006年 | 30640篇 |
2005年 | 23926篇 |
2004年 | 17438篇 |
2003年 | 15075篇 |
2002年 | 11976篇 |
2001年 | 10477篇 |
2000年 | 8990篇 |
1999年 | 7241篇 |
1998年 | 6498篇 |
1997年 | 5979篇 |
1996年 | 5051篇 |
1995年 | 4871篇 |
1994年 | 4617篇 |
1993年 | 3739篇 |
1992年 | 3851篇 |
1991年 | 3374篇 |
1990年 | 3154篇 |
1989年 | 2943篇 |
1988年 | 2741篇 |
1987年 | 2420篇 |
1986年 | 2129篇 |
1985年 | 5875篇 |
1984年 | 6935篇 |
1983年 | 4920篇 |
1982年 | 5660篇 |
1981年 | 5067篇 |
1980年 | 4497篇 |
1979年 | 4082篇 |
1978年 | 3452篇 |
1977年 | 2786篇 |
1976年 | 2952篇 |
1975年 | 2145篇 |
1974年 | 1944篇 |
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
21.
目的:通过中英文文献了解结直肠癌患者生命质量研究现状及发展趋势。方法:运用CiteSpace对中国知网(CNKI)、万方数据知识服务平台、中国生物医学文献数据库、Web of Science核心数据集、PubMed、Cochrane Library中收录的关于结直肠癌患者生命质量研究的中英文文献进行可视化分析。结果:检索得到中文文献1 285篇,英文文献871篇,中英文文献发文量均呈上升趋势,相关研究关注的重点主要是结直肠癌患者造口、抑郁、免疫、肠道功能、化疗及化疗药物,但机构之间、学者之间合作程度及研究类型等方面存在一定差异。结论:中文文献相关研究起步晚、发展快,但在研究质量与研究深度等方面与英文文献相比还有一定差距;国内学者之间、机构之间应加强合作,关心患者肠道功能、心理状况,提高患者体力活动水平,开展更多高质量研究。 相似文献
22.
23.
24.
ObjectivesOsteopathy is regulated as an independent healthcare profession in Portugal. The Osteopathic Practitioners Estimates and RAtes (OPERA) project was developed as a survey to profile the osteopathic profession. This study aimed to describe the characteristics of Portuguese osteopathic practitioners.MethodsA voluntary online-based survey was distributed across Portugal between February and June 2020. The survey, composed of 52 questions and seven sections, was formally translated from English to Portuguese and adapted from the original version. Two pilot tests evaluated cultural adaptation and reproducibility. Adult, self-defined osteopaths working in Portugal were eligible. Recruitment of participants was performed through social media and an e-based campaign.ResultsA total of 222 osteopaths participated in the study, 143 were male (64%), aging between 30 and 39 years (42%), mainly working in Lisbon (30%). Most respondents had preliminary healthcare training (68%), mainly as massage therapists. The majority of respondents were self-employed (83%), owner of a clinic (55%) and working alone (59%). The median number of consultations per week was 21–25 and respondents scheduled 46–60 min for each consultation. The majority of patients seek care for lumbar (52%), cervical (38%) and upper spine (38%) complaints. Although most respondents experience a strong osteopathic identity, they do not advertise themselves exclusively as osteopaths.ConclusionsThis study represents the first nationwide document to determine osteopaths' characteristics in Portugal. The study results provide a basis for future surveys that will include cohorts with higher levels of education, as well as findings from other European countries. 相似文献
25.
26.
27.
The Postoperative Short Course Content Study group 《Anaesthesia》2022,77(5):570-579
Most surgical and anaesthetic mortality and morbidity occurs postoperatively, disproportionately affecting low- and middle-income countries. Various short courses have been developed to improve patient outcomes in low- and middle-income countries, but none specifically to address postoperative care and complications. We aimed to identify key features of a proposed short-course addressing this topic using a Delphi process with low- and middle-income country anaesthesia providers trained as short-course facilitators. An initial questionnaire was co-developed from literature review and exploratory workshops to include 108 potential course features. Features included content; teaching method; appropriate participants; and appropriate faculty. Over three Delphi rounds (panellists numbered 86, 64 and 35 in successive cycles), panellists indicated which features they considered most important. Responses were analysed by geographical regions: Africa, the Americas, south-east Asia and Western Pacific. Ultimately, panellists identified 60, 40 and 54 core features for the proposed course in each region, respectively. There were high levels of consensus within regions on what constituted core course content, but not between regions. All panellists preferred the small group workshop teaching method irrespective of region. All regions considered anaesthetists to be key facilitators, while all agreed that both anaesthetists and operating theatre nurses were key participants. The African and Americas regional panels recommended more multidisciplinary healthcare professionals for participant roles. Faculty from high-income countries were not considered high priority. Our study highlights variability between geographical regions as to which course features were perceived as most locally relevant, supporting regional adaptation of short-course design rather than a one-size-fits-all model. 相似文献
28.
29.
徐华 《世界科学技术-中医药现代化》2022,24(5):338-348
目的 采用液质联用技术分析白鲜皮中的主要化学成分;基于网络药理学技术研究白鲜皮治疗皮肤湿疹的活性成分、作用靶点及作用机制。方法 利用液质联用技术(LC-MS)对白鲜皮主要成分进行分析,通过质谱数据结合文献资料,对各主要成分进行快速识别;通过利用SwissADME数据库对白鲜皮潜在活性成分进行预测,筛选主要作用靶点。进行KEGG通路富集分析,最终得到白鲜皮成分-靶点-疾病-通路网络图。采用分子对接技术对主要成分和作用靶点进行验证。结果 从白鲜皮中共分析鉴定了12种成分,进一步筛选得到4种潜在活性成分,可作用于48个关键靶点和14条主要通路。结论 采用LC-MS技术结合网络药理学方法,可以快速分析白鲜皮的潜在活性成分,并初步揭示了成分-靶点-通路之间的关系。通过分子对接技术可以做作用靶点进行验证。 相似文献
30.