全文获取类型
收费全文 | 1379266篇 |
免费 | 103697篇 |
国内免费 | 4405篇 |
专业分类
耳鼻咽喉 | 17191篇 |
儿科学 | 44808篇 |
妇产科学 | 37212篇 |
基础医学 | 203463篇 |
口腔科学 | 36696篇 |
临床医学 | 134656篇 |
内科学 | 266219篇 |
皮肤病学 | 27065篇 |
神经病学 | 115607篇 |
特种医学 | 49937篇 |
外国民族医学 | 366篇 |
外科学 | 191464篇 |
综合类 | 29432篇 |
现状与发展 | 1篇 |
一般理论 | 514篇 |
预防医学 | 118700篇 |
眼科学 | 30022篇 |
药学 | 102088篇 |
7篇 | |
中国医学 | 3214篇 |
肿瘤学 | 78706篇 |
出版年
2021年 | 11798篇 |
2019年 | 12483篇 |
2018年 | 17347篇 |
2017年 | 13009篇 |
2016年 | 14041篇 |
2015年 | 16139篇 |
2014年 | 22213篇 |
2013年 | 34002篇 |
2012年 | 47186篇 |
2011年 | 49918篇 |
2010年 | 28771篇 |
2009年 | 26404篇 |
2008年 | 45344篇 |
2007年 | 47979篇 |
2006年 | 48010篇 |
2005年 | 46317篇 |
2004年 | 44090篇 |
2003年 | 41907篇 |
2002年 | 40608篇 |
2001年 | 61492篇 |
2000年 | 63136篇 |
1999年 | 52911篇 |
1998年 | 15083篇 |
1997年 | 13667篇 |
1996年 | 13455篇 |
1995年 | 12766篇 |
1994年 | 11881篇 |
1993年 | 11195篇 |
1992年 | 41960篇 |
1991年 | 41129篇 |
1990年 | 39817篇 |
1989年 | 37695篇 |
1988年 | 34921篇 |
1987年 | 33983篇 |
1986年 | 32438篇 |
1985年 | 30971篇 |
1984年 | 23309篇 |
1983年 | 19805篇 |
1982年 | 11946篇 |
1979年 | 21009篇 |
1978年 | 15006篇 |
1977年 | 12226篇 |
1976年 | 12029篇 |
1975年 | 12255篇 |
1974年 | 14976篇 |
1973年 | 14627篇 |
1972年 | 13503篇 |
1971年 | 12546篇 |
1970年 | 11636篇 |
1969年 | 10543篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
951.
Jessica Swoboda DDS H. Asuman Kiyak MA PhD Rigmor E. Persson DDS MSD G. Rutger Persson DDS PhD David K. Yamaguchi PhD Michael I. MacEntee LDS FRCD© PhD Christopher C.L. Wyatt BSc DMD MSc 《Special care in dentistry》2006,26(4):137-144
There is limited information regarding oral health status and other predictors of oral health‐related quality of life. An association between oral health status and perceived oral health‐related quality of life (OHQOL) might help clinicians motivate patients to prevent oral diseases and improve the outcome of some dental public health programs. This study evaluated the relationship between older persons' OHQOL and their functional dentition, caries, periodontal status, chronic diseases, and some demographic characteristics. A group of 733 low‐income elders (mean age 72.7 ISD=4.71, 55.6% women, 55.1% members of ethnic minority groups in the U.S. and Canada) enrolled in the TEETH clinical trial were interviewed and examined as part of their fifth annual visit for the trial. OHQOL was measured by the Geriatric Oral Health Assessment Index (GOHAI); oral health and occlusal status by clinical exams and the Eichner Index; and demographics via interviews. Elders who completed the four‐year assessment had an average of 21.5 teeth (SD=6.9). with 8.5 occluding pairs (SD=4.6), and 32% with occlusal contacts in all four occluding zones. Stepwise multiple regressions were conducted to predict total GOHAI and its subscores (Physical, Social, and Worry). Functional dentition was a less significant predictor than ethnicity and being foreign‐bom. These variables, together with gender, years since immigrating, number of carious roots, and periodontal status, could predict 32% of the variance in total GOHAI, 24% in Physical, 27% in Social, and 21 % in the Worry subscales. These findings suggest that functional dentition and caries influence older adults' OHQOL, but that ethnicity and immigrant status play a larger role. 相似文献
952.
953.
Jeffrey N Baldwin David M Scott Sangeeta Agrawal Jean K Bartek R Ellen Davis-Hall Thomas P Reardon Edward M DeSimone 《Substance Abuse》2006,27(3):27-37
Alcohol and other drug (AOD) use behaviors of health professions students (HPS) were assessed by surveying both university-based HPS and other nursing programs in a Midwestern state in 1999. Response was 2,646 (56.4%) of surveyed students. Family history of alcohol-related and drug-related problems were reported by 39.8% and 13.9%, respectively, with 42.6% of respondents reporting one or both. Among nursing respondents, 48.1%, 19.2% and 51.1%, respectively, reported family problems with alcohol, drugs, or one or both. Past-year alcohol use was comparable to undergraduate college students (UCS) nationally (83%); heavy drinking, tobacco and recreational drug use by HPS were lower. Past year drug use was highest among medical students. Marijuana was the predominant illicit drug; medical students and males most often reported use. Health professions educational systems should proactively address student AOD prevention, education and assistance needs. 相似文献
954.
The first 150 words of the full text of this article appear below. Key points. . . [Full Text of this Article]
Nerve agents
AChE inhibitionOther cholinesterasesPhysical propertiesLatency and toxicityPharmacological propertiesClinical manifestationsTreatmentPyridostigmineAtropinePralidoxime
- Chemical personal protective equipment must be wornwhen in contact with contaminated casualties.
- Recognizing theclinical features of chemical warfare agent poisoning allowssupportive treatment and appropriate antidotes to be promptlyadministered.
- The mnemonic DUMBELS describes the muscarinicfeatures of the nerve agent poisoning toxidrome.
- There areeffective antidotes for poisoning with nerve agents, blood agents(metabolic poisons), botulinum toxin and kolokol-1.
- There areno specific antidotes for blistering agents (vesicants) andchoking agents.