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   62997篇
  免费   3126篇
  国内免费   288篇
耳鼻咽喉   838篇
儿科学   1709篇
妇产科学   1600篇
基础医学   8340篇
口腔科学   1545篇
临床医学   4637篇
内科学   15620篇
皮肤病学   1474篇
神经病学   5529篇
特种医学   2109篇
外国民族医学   6篇
外科学   7803篇
综合类   349篇
一般理论   20篇
预防医学   6161篇
眼科学   1049篇
药学   4243篇
中国医学   187篇
肿瘤学   3192篇
  2023年   348篇
  2022年   283篇
  2021年   1654篇
  2020年   961篇
  2019年   1545篇
  2018年   3308篇
  2017年   2007篇
  2016年   1391篇
  2015年   1405篇
  2014年   2031篇
  2013年   2754篇
  2012年   4036篇
  2011年   4169篇
  2010年   2411篇
  2009年   2146篇
  2008年   3522篇
  2007年   3573篇
  2006年   3388篇
  2005年   3414篇
  2004年   3134篇
  2003年   2957篇
  2002年   2784篇
  2001年   1502篇
  2000年   1574篇
  1999年   1283篇
  1998年   466篇
  1997年   301篇
  1996年   309篇
  1995年   294篇
  1994年   259篇
  1993年   249篇
  1992年   648篇
  1991年   521篇
  1990年   523篇
  1989年   465篇
  1988年   405篇
  1987年   432篇
  1986年   380篇
  1985年   342篇
  1984年   239篇
  1983年   196篇
  1979年   191篇
  1978年   160篇
  1977年   134篇
  1976年   138篇
  1975年   146篇
  1974年   159篇
  1973年   166篇
  1972年   151篇
  1971年   141篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Odontology - The purpose of this study was to investigate whether the root perforation repair with mineral aggregate-based cements affects the retention of customized fiberglass posts to bovine...  相似文献   
2.
3.
IntroductionThe current paradigm of the management of rheumatoid arthritis (RA) recommends achieving a state of remission or low disease activity through the treat-to-target strategy. Our study assesses adherence to this strategy.MethodPatients with RA (ACR-EULAR 2010 criteria) were included. From each centre, 19 patients were randomly selected. Clinical histories (CH) were assessed by independent auditors, checking compliance with predefined quality criteria. The study was approved by ethics committees.ResultsWe included 856 patients (mean age 54 years; 71% women). The use of a combined index (CI) was recorded in 61% of cases. Visits were recorded every 4 weeks using a CI in 4% of CH while attempts were made to achieve remission. Monitoring of disease activity every 6–8 months after reaching the target was recorded in 73% of cases.ConclusionsThe implementation of the treat-to-target strategy is barely recorded in patients with RA in routine clinical practice.  相似文献   
4.
BackgroundThe optimal regimen for intravenous administration of intraoperative fluids remains unclear. Our goal was to analyze intraoperative crystalloid volume administration practices and their association with postoperative outcomes.MethodsWe extracted clinical data from two multicenter observational studies including adult patients undergoing colorectal surgery and total hip (THA) and knee arthroplasty (TKA). We analyzed the distribution of intraoperative fluid administration. Regression was performed using a general linear model to determine factors predictive of fluid administration. Patient outcomes and intraoperative crystalloid utilization were summarized for each surgical cohort. Regression models were developed to evaluate associations of high or low intraoperative crystalloid with the likelihood of increased postoperative complications, mainly acute kidney injury (AKI) and hospital length of stay (LOS).Results7,580 patients were included. The average adjusted intraoperative crystalloid infusion rate across all surgeries was to 7.9 (SD 4) mL/kg/h. The regression model strongly favored the type of surgery over other patient predictors. We found that high fluid volume was associated with 40% greater odds ratio (OR 1.40; 95% confidence interval1.01-1.95, p = 0.044) of postoperative complications in patients undergoing THA, while we found no associations for the other types of surgeries, AKI and LOSConclusionsA wide variability was observed in intraoperative crystalloid volume administration; however, this did not affect postoperative outcomes.  相似文献   
5.
International Journal of Clinical Oncology - Immune-checkpoint inhibitors (ICIs) are standard treatments for metastatic non-small cell lung cancer (NSCLC). Patients with poor performance status...  相似文献   
6.
结核病与糖尿病均是临床上的常见病和多发病,两者可合并存在,相互影响。活动性结核病作为感染因素可加重糖尿病病情,而糖尿病患者又是发生结核病的高危人群,结核病与糖尿病双重负担将成为重大的全球公共卫生问题。因此,需重视结核病与糖尿病共病的治疗管理。本共识重点介绍了结核病与糖尿病共病的危害、发病机制、双向筛查、临床特点、诊断、治疗和管理等内容。  相似文献   
7.
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   
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