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   57702篇
  免费   3587篇
  国内免费   167篇
耳鼻咽喉   1346篇
儿科学   1825篇
妇产科学   2201篇
基础医学   7713篇
口腔科学   584篇
临床医学   7074篇
内科学   11159篇
皮肤病学   887篇
神经病学   6050篇
特种医学   1071篇
外国民族医学   1篇
外科学   4448篇
综合类   784篇
一般理论   43篇
预防医学   6064篇
眼科学   1396篇
药学   5174篇
中国医学   113篇
肿瘤学   3523篇
  2023年   271篇
  2022年   501篇
  2021年   992篇
  2020年   599篇
  2019年   1025篇
  2018年   1440篇
  2017年   1069篇
  2016年   1173篇
  2015年   1258篇
  2014年   1844篇
  2013年   2783篇
  2012年   3904篇
  2011年   4302篇
  2010年   2210篇
  2009年   1798篇
  2008年   3576篇
  2007年   4114篇
  2006年   4271篇
  2005年   4167篇
  2004年   4147篇
  2003年   3990篇
  2002年   3550篇
  2001年   822篇
  2000年   757篇
  1999年   662篇
  1998年   576篇
  1997年   439篇
  1996年   391篇
  1995年   376篇
  1994年   279篇
  1993年   306篇
  1992年   222篇
  1991年   219篇
  1990年   216篇
  1989年   184篇
  1988年   205篇
  1987年   170篇
  1986年   154篇
  1985年   171篇
  1984年   205篇
  1983年   202篇
  1982年   259篇
  1981年   203篇
  1980年   204篇
  1979年   129篇
  1978年   128篇
  1977年   131篇
  1976年   99篇
  1975年   88篇
  1974年   87篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Abstract

Purpose

Financial hardship can be a major cause of distress among persons with cancer, resulting in chronic stress and impacting physical and emotional health. This paper provides an analysis of the lived experience of cancer patients’ financial hardship from diagnosis to post-treatment.  相似文献   
2.
3.
4.
5.
Few studies have examined the effects of parental incarceration (PI) on outcomes above and beyond other risk and adverse childhood experiences (ACEs). The objectives of this study were to (1) the associations between PI and mental health problems (attention, externalizing, internalizing, and total behavioral problems) and (2) the mediating role of current socioeconomic status and cumulative ACEs. An observational and cross-sectional design was employed. Analyses included hierarchical multivariable linear regression modeling. The analytic sample included 613 adolescents (11–17?years). On average, youth exposed to PI experienced three times as many ACEs compared with youth unexposed. Youth exposed to PI were more likely to have behavioral problems than their unexposed peers. The main effect for all models was attenuated by current economic hardship as well as exposure to increasing numbers of ACEs. Exposure to PI can be viewed as a marker of accumulative risk for intervention since youth impacted by PI are more likely to experience behavioral difficulties and associated adverse childhood experiences. Due to the associated adversity that impact youth exposed to PI, mental health providers need to be able to identify and screen for symptoms associated with trauma.  相似文献   
6.
The current literature suggests that the antibacterial effect of leukocyte- and platelet-rich plasma (L-PRP) is directly related to platelet and leukocyte concentrations. The aim of this study was twofold: first, to evaluate the antimicrobial effect of L-PRP against selected bacterial strains in vitro, and second, to correlate this effect with leukocyte and platelet content in the final concentration. Blood was collected from 20 healthy males, and L-PRP, acellular plasma (AP), and autologous thrombin were consecutively prepared. Flow cytometry analysis of the blood, L-PRP, and AP was performed. The L-PRP gel, liquid L-PRP, and thrombin samples were tested in vitro for their antibacterial properties against seven selected bacterial strains using the Kirby–Bauer disk-diffusion method. There was notable antimicrobial activity against selected bacterial strains. No statistically significant correlations between antimicrobial activities and the platelet concentration in L-PRP were observed. Statistically significant positive correlations between selected leukocyte subtypes and antimicrobial activity were noted. A negative correlation was found between elevated monocyte count and antimicrobial activity of L-PRP against one bacterial strain studied. L-PRP possesses antimicrobial activity and can be potentially useful in the fight against certain postoperative infections. The bactericidal effect of L-PRP is caused by leukocytes, and there exists a relationship among selected leukocyte subtypes and L-PRP antimicrobial activity.  相似文献   
7.
8.
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