首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   21337篇
  免费   5641篇
  国内免费   126篇
耳鼻咽喉   640篇
儿科学   624篇
妇产科学   691篇
基础医学   310篇
口腔科学   2644篇
临床医学   4152篇
内科学   5140篇
皮肤病学   456篇
神经病学   1816篇
特种医学   980篇
外科学   3771篇
综合类   55篇
现状与发展   12篇
预防医学   2724篇
眼科学   322篇
药学   188篇
中国医学   6篇
肿瘤学   2573篇
  2024年   181篇
  2023年   1149篇
  2022年   418篇
  2021年   636篇
  2020年   1212篇
  2019年   482篇
  2018年   1324篇
  2017年   1286篇
  2016年   1500篇
  2015年   1553篇
  2014年   1952篇
  2013年   2355篇
  2012年   756篇
  2011年   729篇
  2010年   1345篇
  2009年   1940篇
  2008年   736篇
  2007年   483篇
  2006年   633篇
  2005年   448篇
  2004年   316篇
  2003年   283篇
  2002年   241篇
  2001年   379篇
  2000年   271篇
  1999年   379篇
  1998年   499篇
  1997年   480篇
  1996年   531篇
  1995年   386篇
  1994年   299篇
  1993年   259篇
  1992年   173篇
  1991年   153篇
  1990年   138篇
  1989年   141篇
  1988年   122篇
  1987年   122篇
  1986年   99篇
  1985年   92篇
  1984年   75篇
  1983年   89篇
  1982年   82篇
  1981年   67篇
  1980年   45篇
  1979年   32篇
  1978年   32篇
  1977年   43篇
  1976年   31篇
  1975年   27篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
Objective: To describe a model for providing breastfeeding support in the neonatal intensive-care unit (NICU).
Design: Naturalistic, participant observation.
Setting: Suburban Level III NICU.
Patients: One hundred thirty-two mother-infant pairs over 1 year. Infants were hospitalized In the NICU, and mothers had initiated lactation efforts.
Interventions: Investigators provided breastfeeding interventions for the mother-infant pairs, based on identified problems, the research literature, or both.
Main Outcome Measures: Percentage of mothers who were breastfeeding at the time of discharge from the NICU.
Results: Interventions were classified into jive categories: expression and collection of mothers' milk, gavage feeding of expressed mothers' milk, in-hospital breastfeeding sessions, postdischarge breastfeeding management, and additional consultation.
Conclusions: This model was effective In preventing breastfeeding failure for this population. The model can provide the basis for NICU breastfeeding standards of care, protocols, and chart records, or for reimbursement purposes. The model also provides a framework for studying a specific category or breastfeeding intervention.  相似文献   
84.
85.
The AIDS epidemic has caused hysteria among the public and concern to many healthcare workers in the past 12 years. Currently, legislation exists for mandatory AIDS testing in some populations. The questions remain: Should healthcare workers be routinely tested? If so, is mandatory testing ethical? The author explores the incidence and prevalence of AIDS among healthcare workers, discusses why mandatory testing for healthcare workers is an issue, and examines the legal and ethical principles involved in mandatory testing.  相似文献   
86.
Complementary modalities, used alone or in combination with pharmacologic therapies, play an important role in the prevention and management of postoperative nausea and vomiting (PONV) and post discharge nausea and vomiting (PDNV). This article will review the evidence for the effective use of complementary modalities: acupuncture and related techniques, aromatherapy, and music therapy that may be integrated in the perianesthesia nurse's plan of care to prevent or manage PONV.  相似文献   
87.
88.
89.
Comparison of the use of nalbuphine and fentanyl during third molar surgery   总被引:1,自引:0,他引:1  
In a double-blind, randomized plan of drug administration, nalbuphine, fentanyl, and a placebo were compared for efficacy in sedation and analgesia during third molar removal. Fifty-eight patients participated in this study. Using accepted intravenous sedation and surgical techniques, fentanyl and nalbuphine were found to be better than placebo for anxiety and pain control in third molar surgery. Fentanyl had a longer duration of pain relief postoperatively than did nalbuphine. The study confirmed the need for a narcotic supplement to sedation techniques for third molar surgery.  相似文献   
90.
Many care-dependent elderly individuals live in nursing homes and must depend on nursing home aides for oral hygiene care. It is generally agreed that the level of oral hygiene care among care-dependent nursing home residents is less than optimal. Two reasons are time constraints and the difficulty involved in brushing other individuals' teeth. The identification of effective and efficient plaque-removal devices for use by care-providers should make it easier for nursing home aides to incorporate effective oral hygiene care into their daily routines. This pilot study was undertaken to determine the relative effectiveness of four plaque removal devices with different basic designs when used by a non-professional careprovider on 10 healthy volunteers. A brush with curved bristles on the lateral aspect of the brush head and short straight bristles in the center (Collis-curve) and an electric toothbrush with tuffs that rotate reciprocally (Interplak) were the most effective, a conventional brush (Oral-B) was somewhat less effective, and a disposable foam brush (Abco) was least effective and similar to the prebrushing plaque score (baseline). All the volunteers reported that the Collis-curve as the most comfortable brush, and the care-provider reported that it was the easiest to use.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号