全文获取类型
收费全文 | 1380090篇 |
免费 | 105767篇 |
国内免费 | 2624篇 |
专业分类
耳鼻咽喉 | 19490篇 |
儿科学 | 47688篇 |
妇产科学 | 37391篇 |
基础医学 | 196852篇 |
口腔科学 | 37831篇 |
临床医学 | 120590篇 |
内科学 | 281299篇 |
皮肤病学 | 30649篇 |
神经病学 | 110371篇 |
特种医学 | 53623篇 |
外国民族医学 | 661篇 |
外科学 | 205641篇 |
综合类 | 27426篇 |
现状与发展 | 1篇 |
一般理论 | 425篇 |
预防医学 | 106357篇 |
眼科学 | 29566篇 |
药学 | 102034篇 |
2篇 | |
中国医学 | 2834篇 |
肿瘤学 | 77750篇 |
出版年
2021年 | 11571篇 |
2019年 | 12076篇 |
2018年 | 16545篇 |
2017年 | 12571篇 |
2016年 | 13903篇 |
2015年 | 15696篇 |
2014年 | 21601篇 |
2013年 | 31898篇 |
2012年 | 44596篇 |
2011年 | 47037篇 |
2010年 | 27677篇 |
2009年 | 25905篇 |
2008年 | 43717篇 |
2007年 | 46360篇 |
2006年 | 46039篇 |
2005年 | 44509篇 |
2004年 | 43024篇 |
2003年 | 41283篇 |
2002年 | 40118篇 |
2001年 | 64570篇 |
2000年 | 66894篇 |
1999年 | 57005篇 |
1998年 | 15879篇 |
1997年 | 14375篇 |
1996年 | 14717篇 |
1995年 | 13884篇 |
1994年 | 13186篇 |
1993年 | 12115篇 |
1992年 | 44842篇 |
1991年 | 43662篇 |
1990年 | 42414篇 |
1989年 | 40291篇 |
1988年 | 37071篇 |
1987年 | 36378篇 |
1986年 | 33780篇 |
1985年 | 32392篇 |
1984年 | 24270篇 |
1983年 | 20397篇 |
1982年 | 11874篇 |
1981年 | 10800篇 |
1979年 | 21420篇 |
1978年 | 14893篇 |
1977年 | 12602篇 |
1976年 | 11752篇 |
1975年 | 12670篇 |
1974年 | 14716篇 |
1973年 | 14154篇 |
1972年 | 12975篇 |
1971年 | 11752篇 |
1970年 | 11078篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Molnár B. Aroca S. Dobos A. Orbán K. Szabó J. Windisch P. Stähli A. Sculean A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with... 相似文献
2.
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
3.
4.
5.
6.
7.
8.
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9.
Raymond J. Chan RN PhD Vivienne E. Milch MBBS MHPol Fiona Crawford-Williams PhD Oluwaseyifunmi Andi Agbejule BRadTherapy Ria Joseph MNutrDiet Jolyn Johal BND Narayanee Dick BSc Matthew P. Wallen PhD Julie Ratcliffe PhD Anupriya Agarwal MBBS Larissa Nekhlyudov MD Matthew Tieu PhD Manaf Al-Momani BPharm Scott Turnbull PhD Rahul Sathiaraj MPH Dorothy Keefe MBBS MD Nicolas H. Hart PhD 《CA: a cancer journal for clinicians》2023,73(6):565-589
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs. 相似文献