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   250050篇
  免费   12342篇
  国内免费   431篇
耳鼻咽喉   3334篇
儿科学   7920篇
妇产科学   5253篇
基础医学   35567篇
口腔科学   6029篇
临床医学   19699篇
内科学   54480篇
皮肤病学   6548篇
神经病学   22216篇
特种医学   7777篇
外国民族医学   101篇
外科学   31783篇
综合类   1110篇
一般理论   66篇
预防医学   22849篇
眼科学   4972篇
药学   17579篇
中国医学   751篇
肿瘤学   14789篇
  2023年   1344篇
  2022年   914篇
  2021年   3698篇
  2020年   2252篇
  2019年   4106篇
  2018年   7771篇
  2017年   5186篇
  2016年   5262篇
  2015年   5866篇
  2014年   6140篇
  2013年   9842篇
  2012年   16761篇
  2011年   16816篇
  2010年   8464篇
  2009年   6384篇
  2008年   14310篇
  2007年   15404篇
  2006年   14197篇
  2005年   14096篇
  2004年   13260篇
  2003年   12191篇
  2002年   11472篇
  2001年   6604篇
  2000年   6687篇
  1999年   5950篇
  1998年   1069篇
  1997年   885篇
  1996年   841篇
  1992年   3471篇
  1991年   3108篇
  1990年   2977篇
  1989年   2737篇
  1988年   2609篇
  1987年   2405篇
  1986年   2310篇
  1985年   2124篇
  1984年   1583篇
  1983年   1347篇
  1982年   771篇
  1979年   1390篇
  1978年   972篇
  1977年   905篇
  1975年   921篇
  1974年   1132篇
  1973年   1139篇
  1972年   1087篇
  1971年   1038篇
  1970年   963篇
  1969年   1042篇
  1968年   905篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
22.
23.
ObjectiveTo assess the evolution of cost per patient/year and the cost per patient/year/drug in patients with rheumatoid arthritis (RA) receiving biological treatments. To analyze and quantify the factors influencing this evolution, such as the optimization of the biological drugs, the use of biosimilars, and official discounts and discounts obtained after negotiated procedures. In addition, to assess specific clinical parameters of disease activity in these patients.MethodsRetrospective, observational study conducted in a Spanish tertiary hospital. Adult patients diagnosed with RA under treatment from 2009 to 2017 were included.Results320, 270 and 389 patients were included in 2009, 2013 and 2017, respectively. The patient/year cost decreased from 10,789€ in 2009, 7491€ in 2013 to 7116€ in 2017. In 2017, due to the established competition, discounts of 14% and 29.5% were achieved on etanercept and its biosimilar; 11.5%, 17.8%, 17.9%, 17.3% on adalimumab, certolizumab, golimumab and tocilizumab IV respectively, and 24.6% and 43.1% on infliximab and its biosimilar. The percentage of patients optimized in 2017 was 35.2%. The annual saving in 2017 was 1,288,535€ (830,000€ due to dose optimization and/or administration regimens, 249,666€ corresponding to 7.5% of the official discount and 208,868€ after negotiated procedures).ConclusionThe annual cost per patient in RA decreased considerably due to different factors, such as discounts on the purchase of drugs due to official discounts and negotiated procedures, together with the optimization of therapies, the latter being the factor that contributed most to this decrease.  相似文献   
24.
25.
Due to the COVID-19 pandemic's consequences and the state of alarm, literature has shown that people worldwide have experienced severe stressors that have been associated with increased prevalence of emotional distress. In this study, we explored psychological distress (depression, anxiety, and somatization symptoms) using an online survey platform in a sample of 1,781 Spanish adults during the confinement due to COVID-19, relationships between distress and sleep problems, affect, pain, sleep, emotional regulation, gender, type of housing, history of psychopathology, and living alone during the confinement, and differences depending on demographic and psychological variables. Results showed that between 25% and 39% of the sample referred to clinically significant levels of distress. In addition, women showed higher levels of distress, negative affect, perception of pain, and cognitive reappraisal and lower levels of emotional suppression and sleep quality than men. A history of psychopathology, being younger, living alone or in a flat was associated with higher distress. Finally, the variables most strongly related to distress were negative and positive affect, levels of pain, sleep quality, and emotional suppression. Our results highlight the important role of emotional suppression, cognitive reappraisal, and loneliness and the impact of being a woman and younger in Spain during the COVID-19 pandemic. Therefore, it would be necessary to provide assessments of distress levels in these population groups and focus psychological preventive and therapeutic online interventions on expressing emotions and preventing loneliness.  相似文献   
26.
IntroductionThe main challenge of Parkinson's disease in women of childbearing age is managing symptoms and drugs during pregnancy and breastfeeding. The increase in the age at which women are having children makes it likely that these pregnancies will become more common in future.ObjectivesThis study aims to define the clinical characteristics of women of childbearing age with Parkinson's disease and the factors affecting their lives, and to establish a series of guidelines for managing pregnancy in these patients.ResultsThis consensus document was developed through an exhaustive literature search and a discussion of the available evidence by a group of movement disorder experts from the Spanish Society of Neurology.ConclusionsParkinson's disease affects all aspects of sexual and reproductive health in women of childbearing age. Pregnancy should be well planned to minimise teratogenic risk. A multidisciplinary approach should be adopted in the management of these patients in order to take all relevant considerations into account.  相似文献   
27.
28.
29.
30.
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