全文获取类型
收费全文 | 93686篇 |
免费 | 5901篇 |
国内免费 | 1792篇 |
专业分类
耳鼻咽喉 | 3097篇 |
儿科学 | 1443篇 |
妇产科学 | 1610篇 |
基础医学 | 3640篇 |
口腔科学 | 3157篇 |
临床医学 | 10350篇 |
内科学 | 12804篇 |
皮肤病学 | 729篇 |
神经病学 | 2846篇 |
特种医学 | 2130篇 |
外国民族医学 | 20篇 |
外科学 | 28171篇 |
综合类 | 12330篇 |
现状与发展 | 6篇 |
一般理论 | 2篇 |
预防医学 | 3154篇 |
眼科学 | 4568篇 |
药学 | 4227篇 |
171篇 | |
中国医学 | 1125篇 |
肿瘤学 | 5799篇 |
出版年
2024年 | 166篇 |
2023年 | 2232篇 |
2022年 | 2879篇 |
2021年 | 4805篇 |
2020年 | 4672篇 |
2019年 | 4161篇 |
2018年 | 4029篇 |
2017年 | 3412篇 |
2016年 | 3330篇 |
2015年 | 3515篇 |
2014年 | 7107篇 |
2013年 | 6573篇 |
2012年 | 5230篇 |
2011年 | 5619篇 |
2010年 | 4514篇 |
2009年 | 4344篇 |
2008年 | 4240篇 |
2007年 | 4158篇 |
2006年 | 3666篇 |
2005年 | 3124篇 |
2004年 | 2685篇 |
2003年 | 2167篇 |
2002年 | 1736篇 |
2001年 | 1566篇 |
2000年 | 1396篇 |
1999年 | 1258篇 |
1998年 | 1022篇 |
1997年 | 986篇 |
1996年 | 792篇 |
1995年 | 660篇 |
1994年 | 595篇 |
1993年 | 494篇 |
1992年 | 422篇 |
1991年 | 407篇 |
1990年 | 295篇 |
1989年 | 278篇 |
1988年 | 304篇 |
1987年 | 280篇 |
1986年 | 222篇 |
1985年 | 279篇 |
1984年 | 311篇 |
1983年 | 186篇 |
1982年 | 203篇 |
1981年 | 185篇 |
1980年 | 175篇 |
1979年 | 119篇 |
1978年 | 90篇 |
1977年 | 101篇 |
1976年 | 101篇 |
1975年 | 90篇 |
排序方式: 共有10000条查询结果,搜索用时 230 毫秒
41.
42.
《Surgery for obesity and related diseases》2019,15(7):1219-1224
Endoscopic gastroplasty (EG) has been used in clinical practice to treat obesity. This systematic review has the objective of assessing if there is an acceptable level of scientific evidence on the safety and effectiveness of EG. A thorough search strategy was used up to October 2018, including the 2 most common techniques: endoscopic suturing and the primary obesity surgery endolumenal procedure. The quality of the studies was evaluated through the Joanna Briggs Institute Critical Appraisal tools for use in Systematic Reviews—“Checklist for Case Series”—and summarized using the Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) approach. Only 1 randomized controlled trial (moderate GRADE evidence) was found, and the remaining were case reports or small case series (very low GRADE evidence). The literature has low scientific quality. All studies, with 1 exception, are small case series with short follow-up. One of the randomized controlled trials did not meet the primary endpoint for weight loss in both groups (EG × sham) after 1-year follow-up. The case series reported from 16% to 19% total weight loss, but few had more than 6 months of follow-up. Serious adverse events ranged from 2% to 10%. Based on current literature, there is not enough quality scientific evidence regarding long-term weight loss and the procedure’s safety to recommend the use of EG in current clinical practice. 相似文献
43.
44.
45.
46.
47.
48.
目的 探讨快速康复外科 (FTS)理念在经后颅窝乙状窦后入路三叉神经微血管减压术围术期患者护理中的应用效果。方法 选择2018年1月~2019年1月我院收治并行经后颅窝乙状窦后入路三叉神经微血管减压患者100例,随机分成观察组和对照组,每组50例。对照组应用常规方法进行围术期护理,观察组应用FTS理念进行围术期护理。比较两组焦虑情况、术后并发症发生率、平均住院日及平均住院费用。结果 观察组轻度焦虑多于对照组,中、重度焦虑少于对照组(P<0.05);观察组术后并发症发生率低于对照组[恶心呕吐(4.00% vs 16.00%)、尿路感染(4.00% vs 18.00%)、颅内感染(0 vs 8.00%)、颅内血肿(2.00% vs 14.00%)和术后应激性疼痛(16.00% vs 34.00%)],差异有统计学意义(P<0.05);观察组平均住院日和平均住院费用均低于对照组[(9.13±1.14)d vs(12.44±0.89)d];[(2.15±0.66)万元 vs (3.05±0.61)万元],差异有统计学意义(P<0.05)。结论 应用FTS理念能缓解经后颅窝乙状窦后入路三叉神经微血管减压术患者术前紧张恐惧的心理,减少术后并发症,缩短患者住院日,降低住院费用,护理效果较好。 相似文献
49.
《Journal of microbiology, immunology, and infection》2020,53(3):425-435
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has emerged in Chinese people in December 2019 and has currently spread worldwide causing the COVID-19 pandemic with more than 150,000 deaths. In order for a SARS-CoV like virus circulating in wild life for a very long time to infect the index case-patient, a number of conditions must be met, foremost among which is the encounter with humans and the presence in homo sapiens of a cellular receptor allowing the virus to bind. Recently it was shown that the SARS-CoV-2 spike protein, binds to the human angiotensin I converting enzyme 2 (ACE2). This molecule is a peptidase expressed at the surface of lung epithelial cells and other tissues, that regulates the renin-angiotensin-aldosterone system. Humans are not equal with respect to the expression levels of the cellular ACE2. Moreover, ACE2 polymorphisms were recently described in human populations. Here we review the most recent evidence that ACE2 expression and/or polymorphism could influence both the susceptibility of people to SARS-CoV-2 infection and the outcome of the COVID-19 disease. Further exploration of the relationship between the virus, the peptidase function of ACE2 and the levels of angiotensin II in SARS-CoV-2 infected patients should help to better understand the pathophysiology of the disease and the multi-organ failures observed in severe COVID-19 cases, particularly heart failure. 相似文献
50.
Cost‐Effectiveness and Cost‐Utility Analysis of Spinal Cord Stimulation in Patients With Failed Back Surgery Syndrome: Results From the PRECISE Study 下载免费PDF全文
Furio Zucco MD Roberta Ciampichini MSc Angelo Lavano MD Amedeo Costantini MD Marisa De Rose MD Paolo Poli MD Gianpaolo Fortini MD Laura Demartini MD Enrico De Simone MD Valentino Menardo MD Piero Cisotto MD Mario Meglio MD Luciana Scalone PhD Lorenzo G. Mantovani DSc 《Neuromodulation》2015,18(4):266-276