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   162291篇
  免费   10615篇
  国内免费   4527篇
耳鼻咽喉   1920篇
儿科学   3634篇
妇产科学   4726篇
基础医学   23657篇
口腔科学   4286篇
临床医学   15069篇
内科学   28707篇
皮肤病学   2873篇
神经病学   10722篇
特种医学   5363篇
外国民族医学   20篇
外科学   21491篇
综合类   11827篇
现状与发展   5篇
一般理论   41篇
预防医学   11325篇
眼科学   4012篇
药学   14535篇
  31篇
中国医学   2642篇
肿瘤学   10547篇
  2022年   2199篇
  2021年   3155篇
  2020年   2158篇
  2019年   2561篇
  2018年   3170篇
  2017年   2509篇
  2016年   2449篇
  2015年   3330篇
  2014年   4233篇
  2013年   4565篇
  2012年   6715篇
  2011年   7196篇
  2010年   4324篇
  2009年   3708篇
  2008年   5682篇
  2007年   5934篇
  2006年   5792篇
  2005年   5381篇
  2004年   4469篇
  2003年   4225篇
  2002年   3863篇
  2001年   7750篇
  2000年   7963篇
  1999年   6852篇
  1998年   2455篇
  1997年   2070篇
  1996年   1455篇
  1995年   1334篇
  1994年   1200篇
  1993年   1067篇
  1992年   4064篇
  1991年   4097篇
  1990年   3791篇
  1989年   3758篇
  1988年   3625篇
  1987年   3438篇
  1986年   3227篇
  1985年   3073篇
  1984年   2104篇
  1983年   1854篇
  1979年   1951篇
  1978年   1204篇
  1975年   1200篇
  1974年   1375篇
  1973年   1429篇
  1972年   1364篇
  1971年   1252篇
  1970年   1139篇
  1969年   1127篇
  1968年   1028篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
ContextIt is especially important that patients are well informed when making high-stakes, preference-sensitive decisions like those on the Physician Orders for Life-Sustaining Treatment (POLST) form. However, there is currently no way to easily evaluate whether patients understand key concepts when making these important decisions.ObjectivesTo develop a POLST knowledge survey.MethodsExpert (n = 62) ratings of key POLST facts were used to select items for a POLST knowledge survey. The survey was administered to nursing facility residents (n = 97) and surrogate decision-makers (n = 112). A subset (n = 135) were re-administered the survey after a standardized advance care planning discussion to assess the scale's responsiveness to change.ResultsThe 19-item survey demonstrated adequate reliability (α = 0.72.). Residents' scores (x = 11.4, standard deviation 3.3) were significantly lower than surrogate scores (x = 14.7, standard deviation 2.5) (P < 0.001). Scores for both groups increased significantly after administration of a standardized advance care planning discussion (P < 0.001). Although being a surrogate, age, race, education, cognitive functioning, and health literacy were significantly associated with higher POLST Knowledge Survey scores in univariate analyses, only being a surrogate (P < 0.001) and being white (P = 0.028) remained significantly associated with higher scores in multivariate analyses.ConclusionThe 19-item POLST Knowledge Survey demonstrated adequate reliability and responsiveness to change. Findings suggest the survey could be used to identify knowledge deficits and provide targeted education to ensure adequate understanding of key clinical decisions when completing POLST.  相似文献   
4.
根据国际药物工程协会(ISPE)所提GAMP的理念,谈有关制药行业自动化工程建设与验证方面的问题,其中包括GAMP的基本思想与概念、制药行业自动化工程建设与验证关系问题以及我国制药行业自动化工程建设与验证所存在的问题。  相似文献   
5.
6.
7.
BackgroundThe measurement of health-related quality of life (HRQoL) provides information about the perceived burden of the health condition and treatments from a lived experience. The Brisbane Burn Scar Impact Profile (caregiver report for young children, BBSIP0–8), developed in 2013, is a proxy-report measure of burn scar-specific HRQoL. The aim of this study was to report its psychometric properties in line with an evaluative purpose.MethodsCaregivers of children up to 8 years of age at risk of burn scarring were recruited into a prospective, longitudinal cohort study. Caregivers completed the BBSIP0–8, Pediatric Quality of Life Inventory and Patient Observer Scar Assessment Scale at baseline (approximately ≥85% of the total body surface area re-epithelialised), 1–2 weeks after baseline and 1-month after baseline. Psychometric properties measured included internal consistency, test–retest reliability, validity and responsiveness.ResultsEighty-six caregivers of mostly male children (55%), of a median age (IQR) of 1 year, 10 months (2 years, 1 month) and total body surface area burn of 1.5% (3.0%) were recruited. Over one third of participants were grafted and 15% had contractures or skin tightness at baseline. Internal consistency of ten item groups ranged from 0.73 to 0.96. Hypothesised correlations of changes in the BBSIP0–8 items with changes in criterion measures supported longitudinal validity (ρ ranging from ?0.73 to 0.68). The majority of item groups had acceptable reproducibility (ICC = 0.65–0.83). The responsiveness of five item groups was supported (AUC = 0.71–0.90).ConclusionThe psychometric properties tested support the use of the BBSIP0–8 as an evaluative measure of burn scar-related health-related quality of life for children aged below eight years in the early post-acute period of rehabilitation. Further investigation at longer time period after burn injury is indicated.  相似文献   
8.
骨碎补是历代临床常用中药,具有疗伤止痛、补肾强骨、消风祛斑等功效。其主要含黄酮、苯丙素、三萜、酚酸及其苷等类化学成分,现代研究表明骨碎补具有抗骨质疏松、促进骨折愈合、促软骨再生、护牙健齿、保护肾功能、抗炎、防治中毒性耳聋、降血脂等多种生物活性,开发前景广阔。本文对近年来骨碎补的化学成分、药理作用及临床应用研究进行综述,以期为骨碎补的进一步深入系统的研究和开发利用提供依据。  相似文献   
9.
10.
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