全文获取类型
收费全文 | 235465篇 |
免费 | 12311篇 |
国内免费 | 917篇 |
专业分类
耳鼻咽喉 | 2989篇 |
儿科学 | 7520篇 |
妇产科学 | 5258篇 |
基础医学 | 33201篇 |
口腔科学 | 8035篇 |
临床医学 | 17528篇 |
内科学 | 55837篇 |
皮肤病学 | 6739篇 |
神经病学 | 20912篇 |
特种医学 | 5630篇 |
外国民族医学 | 6篇 |
外科学 | 25793篇 |
综合类 | 1069篇 |
一般理论 | 86篇 |
预防医学 | 22590篇 |
眼科学 | 4738篇 |
药学 | 16375篇 |
中国医学 | 1038篇 |
肿瘤学 | 13349篇 |
出版年
2023年 | 1705篇 |
2022年 | 1359篇 |
2021年 | 6240篇 |
2020年 | 3628篇 |
2019年 | 5996篇 |
2018年 | 8443篇 |
2017年 | 5523篇 |
2016年 | 5811篇 |
2015年 | 6421篇 |
2014年 | 7937篇 |
2013年 | 11093篇 |
2012年 | 18004篇 |
2011年 | 18976篇 |
2010年 | 9951篇 |
2009年 | 7827篇 |
2008年 | 15225篇 |
2007年 | 15790篇 |
2006年 | 14602篇 |
2005年 | 14097篇 |
2004年 | 12583篇 |
2003年 | 11643篇 |
2002年 | 10704篇 |
2001年 | 4614篇 |
2000年 | 5096篇 |
1999年 | 4102篇 |
1998年 | 1393篇 |
1997年 | 1044篇 |
1996年 | 933篇 |
1995年 | 758篇 |
1994年 | 671篇 |
1993年 | 601篇 |
1992年 | 1698篇 |
1991年 | 1354篇 |
1990年 | 1233篇 |
1989年 | 1055篇 |
1988年 | 891篇 |
1987年 | 844篇 |
1986年 | 855篇 |
1985年 | 714篇 |
1984年 | 580篇 |
1983年 | 473篇 |
1982年 | 324篇 |
1979年 | 445篇 |
1975年 | 335篇 |
1974年 | 410篇 |
1973年 | 405篇 |
1972年 | 344篇 |
1971年 | 359篇 |
1970年 | 334篇 |
1969年 | 337篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Lesmana Cosmas Rinaldi Adithya Paramitha Maria Satya Gani Rino A. Lesmana Laurentius A. 《Journal of Medical Ultrasonics》2022,49(3):359-370
Journal of Medical Ultrasonics - Chronic liver disease is still a major problem because disease progression will ultimately lead to liver cirrhosis. Portal hypertension is the hallmark in advanced... 相似文献
2.
3.
Vilar-Compte Mireya Gaitán-Rossi Pablo Félix-Beltrán Lucía Bustamante Arturo V. 《Journal of immigrant and minority health / Center for Minority Public Health》2022,24(1):65-77
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to... 相似文献
4.
Anne-Sophie Worm Fenger Markus Harboe Olsen Maria Louise Fabritius Christian Gunge Riberholt Kirsten Møller 《Acta anaesthesiologica Scandinavica》2023,67(2):240-247
Background
Hyperglycaemia is common in patients with acute brain injury admitted to an intensive care unit (ICU). Many studies have found associations between development of hyperglycaemia and increased mortality in hospitalised patients. However, the optimal target for blood glucose control is unknown. We want to conduct a systematic review with meta-analysis and trial sequential analysis to explore the beneficial and harmful effects of restrictive versus liberal glucose control on patient outcomes in adults with severe acute brain injury.Methods
We will systematically search medical databases including CENTRAL, Embase, MEDLINE and trial registries. We will search the following websites for ongoing or unpublished trials: http://www.controlled-trials.com/ , http://www.clinicaltrials.gov/ , www.eudraCT.com , http://centerwatch.com/ , The Cochrane Library's CENTRAL, PubMed, EMBASE, Science Citation Index Expanded and CINAHL. Two authors will independently review and select trials and extract data. We will include randomised trials comparing levels of glucose control in our analyses and observational studies will be included to address potential harms. The primary outcomes are defined as all-cause mortality, functional outcome and health-related quality of life. Secondary outcomes include serious adverse events including hypoglycaemia, length of ICU stay and duration of mechanical ventilation, and explorative outcomes including intracranial pressure and infection. Trial Sequential Analysis will be used to investigate the risk of type I error due to repetitive testing and to further explore imprecision. Quality of trials will be evaluated using the Cochrane Risk of Bias tool, and quality of evidence will be assessed using the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) approach.Discussion
The results of the systematic review will be disseminated through peer-reviewed publication. With the review, we hope to inform future randomised clinical trials and improve clinical practice. 相似文献5.
6.
María C. Lanuza-López Sandra G. Martínez-Garza Jesús F. Solórzano-Vázquez Daniela Paz-Cervantes Claudia González-Ortega Israel Maldonado-Rosas 《Gynecological endocrinology》2020,36(9):829-834
AbstractOocyte maturation defect is a challenging situation in the management of infertility, the etiology may be related to endocrine causes, protocols used in ovarian stimulation, oocyte intrinsic defects or procedures in embryology laboratory. We report three Mexican females in treatment for primary infertility with non-mature oocytes after ovary stimulation and oocyte capture in whom a genetic diagnosis of TUBB8-oocyte maturation defect was revealed by exome sequencing. Two couples achieved pregnancies though oocyte donation after establishing the genetic etiology. Our results expand the role of TUBB8-disorders in patients of non-Asian ethnicity. Oocyte maturation defects of monogenic origin are a growing group of disorders that endocrinologists and reproductive medicine specialists should be aware in order to provide referral to genetics for establish a correct and opportune diagnosis. 相似文献
7.
8.
9.
10.
Samir Gupta MD MDCS AGAF Balambal Bharti MBBS MPH PhD Dennis J. Ahnen MD Daniel D. Buchanan PhD Iona C. Cheng PhD MPH Michelle Cotterchio PhD Jane C. Figueiredo PhD Steven J. Gallinger MD MSc Robert W. Haile DrPH MPH Mark A. Jenkins PhD Noralane M. Lindor MD Finlay A. Macrae MD AGAF Loïc Le Marchand MD PhD Polly A. Newcomb PhD MPH Stephen N. Thibodeau PhD Aung Ko Win MBBS MPH PhD Maria Elena Martinez PhD 《Cancer》2020,126(13):3013-3020