全文获取类型
收费全文 | 5384703篇 |
免费 | 417569篇 |
国内免费 | 17751篇 |
专业分类
耳鼻咽喉 | 77818篇 |
儿科学 | 168540篇 |
妇产科学 | 144505篇 |
基础医学 | 795425篇 |
口腔科学 | 155490篇 |
临床医学 | 491194篇 |
内科学 | 979697篇 |
皮肤病学 | 124969篇 |
神经病学 | 450569篇 |
特种医学 | 214852篇 |
外国民族医学 | 1416篇 |
外科学 | 806214篇 |
综合类 | 159180篇 |
现状与发展 | 29篇 |
一般理论 | 3038篇 |
预防医学 | 452706篇 |
眼科学 | 130101篇 |
药学 | 388609篇 |
24篇 | |
中国医学 | 14872篇 |
肿瘤学 | 260775篇 |
出版年
2021年 | 59861篇 |
2019年 | 61221篇 |
2018年 | 78414篇 |
2017年 | 60014篇 |
2016年 | 67707篇 |
2015年 | 81085篇 |
2014年 | 116622篇 |
2013年 | 182918篇 |
2012年 | 155572篇 |
2011年 | 163733篇 |
2010年 | 136376篇 |
2009年 | 135550篇 |
2008年 | 147702篇 |
2007年 | 158549篇 |
2006年 | 165126篇 |
2005年 | 159469篇 |
2004年 | 159731篇 |
2003年 | 148683篇 |
2002年 | 138543篇 |
2001年 | 202287篇 |
2000年 | 200724篇 |
1999年 | 180408篇 |
1998年 | 78010篇 |
1997年 | 72532篇 |
1996年 | 70255篇 |
1995年 | 66033篇 |
1994年 | 60111篇 |
1993年 | 55671篇 |
1992年 | 137818篇 |
1991年 | 132740篇 |
1990年 | 127806篇 |
1989年 | 124069篇 |
1988年 | 115626篇 |
1987年 | 113848篇 |
1986年 | 108355篇 |
1985年 | 105644篇 |
1984年 | 85708篇 |
1983年 | 75457篇 |
1982年 | 55359篇 |
1981年 | 50918篇 |
1980年 | 47896篇 |
1979年 | 79211篇 |
1978年 | 60831篇 |
1977年 | 52833篇 |
1976年 | 49409篇 |
1975年 | 50153篇 |
1974年 | 58702篇 |
1973年 | 56538篇 |
1972年 | 53197篇 |
1971年 | 49242篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Leah H. Cobb Emily M. McCabe Lauren B. Priddy 《Journal of orthopaedic research》2020,38(10):2091-2103
Osteomyelitis, or the infection of the bone, presents a major complication in orthopedics and may lead to prolonged hospital visits, implant failure, and in more extreme cases, amputation of affected limbs. Typical treatment for this disease involves surgical debridement followed by long-term, systemic antibiotic administration, which contributes to the development of antibiotic-resistant bacteria and has limited ability to eradicate challenging biofilm-forming pathogens including Staphylococcus aureus—the most common cause of osteomyelitis. Local delivery of high doses of antibiotics via traditional bone cement can reduce systemic side effects of an antibiotic. Nonetheless, growing concerns over burst release (then subtherapeutic dose) of antibiotics, along with microbial colonization of the nondegradable cement biomaterial, further exacerbate antibiotic resistance and highlight the need to engineer alternative antimicrobial therapeutics and local delivery vehicles with increased efficacy against, in particular, biofilm-forming, antibiotic-resistant bacteria. Furthermore, limited guidance exists regarding both standardized formulation protocols and validated assays to predict efficacy of a therapeutic against multiple strains of bacteria. Ideally, antimicrobial strategies would be highly specific while exhibiting a broad spectrum of bactericidal activity. With a focus on S. aureus infection, this review addresses the efficacy of novel therapeutics and local delivery vehicles, as alternatives to the traditional antibiotic regimens. The aim of this review is to discuss these components with regards to long bone osteomyelitis and to encourage positive directions for future research efforts. 相似文献
992.
993.
994.
995.
This article describes early stages in the acquisition of a first vocabulary by infants and young children. It distinguishes two major stages, the first of which operates by a stand‐alone word‐to‐world pairing procedure and the second of which, using the evidence so acquired, builds a domain‐specific syntax‐sensitive structure‐to‐world pairing procedure. As we show, the first stage of learning is slow, restricted in character, and to some extent errorful, whereas the second procedure is determinative, rapid, and essentially errorless. Our central claim here is that the early, referentially based learning procedure succeeds at all because it is reined in by attention‐focusing properties of word‐to‐world timing and related indicants of referential intent. 相似文献
996.
997.
998.
Basmah K. Alwahhabi 《Saudi medical journal》2015,36(10):1149-1150
999.
Metabolic abnormalities of gastrointestinal mucosa in celiac disease: An in vitro proton nuclear magnetic resonance spectroscopy study 下载免费PDF全文
1000.