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   908篇
  免费   68篇
  国内免费   4篇
耳鼻咽喉   8篇
儿科学   30篇
妇产科学   22篇
基础医学   160篇
口腔科学   9篇
临床医学   79篇
内科学   251篇
皮肤病学   6篇
神经病学   91篇
特种医学   11篇
外科学   124篇
综合类   6篇
预防医学   63篇
眼科学   40篇
药学   42篇
肿瘤学   38篇
  2023年   8篇
  2022年   21篇
  2021年   54篇
  2020年   19篇
  2019年   47篇
  2018年   50篇
  2017年   24篇
  2016年   28篇
  2015年   31篇
  2014年   45篇
  2013年   49篇
  2012年   72篇
  2011年   63篇
  2010年   28篇
  2009年   19篇
  2008年   49篇
  2007年   45篇
  2006年   44篇
  2005年   30篇
  2004年   37篇
  2003年   28篇
  2002年   26篇
  2001年   15篇
  2000年   13篇
  1999年   13篇
  1998年   6篇
  1997年   6篇
  1996年   8篇
  1995年   6篇
  1993年   2篇
  1992年   7篇
  1991年   6篇
  1990年   12篇
  1989年   3篇
  1988年   3篇
  1987年   4篇
  1985年   9篇
  1984年   4篇
  1982年   3篇
  1980年   2篇
  1978年   4篇
  1977年   2篇
  1975年   2篇
  1973年   2篇
  1972年   3篇
  1971年   4篇
  1970年   5篇
  1969年   2篇
  1967年   4篇
  1966年   4篇
排序方式: 共有980条查询结果,搜索用时 15 毫秒
971.
972.
ABSTRACT: BACKGROUND: The effect of pregnancy intention on post-natal practices like breastfeeding is still poorly understood in the Philippines. In this light, this study aims to determine the association between pregnancy intention and optimal breastfeeding practices in the Philippines. Methodology: This is a cross-sectional study design using the 2003 Philippine National Demographic and Health Survey. Logistic regression analysis was used to determine the independent association of pregnancy intention and optimal breastfeeding practices. The study includes 3,044 last-born children aged 6-36 months at the time of survey. Dead children were also included as long as their age of death satisfies the age criterion. RESULTS: Children borne from mistimed pregnancies are more likely to have late breastfeeding initiation compared to children borne from wanted pregnancies (OR=1.44; 90%CI: 1.17-1.78). However, this occurs only among children belonging to households with low socio-economic status. Among children belonging to households with high socio-economic status, no significant effect of pregnancy intention on breastfeeding initiation was observed. Children borne from unwanted pregnancies are less likely to have short breastfeeding duration (OR=0.60 90%CI: 0.48-0.76). However, this occurs only among children belonging to households with high socio-economic status. No significant effect of pregnancy intention on breastfeeding duration was observed among children belonging to households with low socio-economic status. CONCLUSION: In the Philippines, children borne from mistimed pregnancies are less likely to have breastfeeding initiation within the first hour. In contrast, children borne from unwanted pregnancies are more likely to have longer breastfeeding duration compared to children borne from wanted pregnancies. Policy interventions should be articulated to further strengthen fertility regulations and evaluate marketing practices of formula milk companies.  相似文献   
973.
The objective was to evaluate the effects of a stress management cognitive behavioural therapy followed during pregnancy on subsequent childhood on hair cortisol at birth and on neurodevelopment and Hair Cortisol Concentrations (HCC) at 6 months of age. The study sample included 48 pregnant women, divided into two groups: 24 women in the Therapy Group (TG) and 24 women who received standard pregnancy care (control group (CG); CG). To test the therapy efficacy, an evaluation of the HCC and psychological stress, psychopathological symptomatology and resilience was conducted before and after the treatment. The level of cortisol in their hair was obtained during pregnancy and that of their babies at birth. Six months after birth, a cortisol sample was taken from the hair and the babies' neurodevelopment was evaluated based on a Bayley-III test. The TG presented reductions in psychological stress and psychopathological symptomatology after treatment. On the other hand, the CG increased their cortisol concentrations between the pre and post intervention, remaining stable in the TG. Moreover, results showed that TG babies had lower cortisol concentrations at birth and obtained significantly higher cognitive and motor development scores at 6 months. These findings support that providing psychological care to pregnant women may not only have a benefit on these women's mental state, but may also benefit the neurodevelopment of their offspring.  相似文献   
974.
975.
976.
977.
The rapid spread of COVID-19 caused many countries to decide to enter full lockdown, a circumstance that impacted all aspects of life, including mental health. The present longitudinal study aimed to analyse how stressors and uplifts of confinement were linked to psychological symptoms at three different time points: during the full lockdown (wave 1), after the gradual lifting of restrictions (wave 2) and after confinement (wave 3). The sample was made up by one hundred and twenty academic and administrative staff from a big University in Spain, they all completed an online survey. Results showed that psychological status did not change over time, but a significant interindividual variability was found throughout. Some stressors were only linked to symptoms at wave 1, but others maintained their associations during waves 2 and 3. Uplifts were, for the most part, inversely (and exclusively) linked to symptoms at wave 1. However, some of them, although enjoyable, were paradoxically linked to worse mental health at wave 1, and even at waves 2 and 3. These findings highlight the importance of providing preventive psychological strategies for mental distress before, during and after confinement.  相似文献   
978.
979.
Fibroblast growth factor receptor (FGFR) tyrosine kinase inhibitors (TKIs) are increasingly being used off label in pediatrics. Long-term safety data are limited, and serious toxicities unique to pediatrics may emerge. In a retrospective analysis of patients less than 18 years of age with recurrent/refractory FGFR altered gliomas treated with FGFR TKIs at MSKCC (n = 7), we observed slipped capital femoral epiphyses in three of seven patients along with increased linear growth velocity. Clinicians should closely monitor bone health and have a low index of suspicion for serious orthopedic complications including slipped capital femoral epiphyses and inform patients of related risks as part of consent when treating with FGFR TKIs.  相似文献   
980.
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