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   535289篇
  免费   35398篇
  国内免费   766篇
耳鼻咽喉   7171篇
儿科学   17524篇
妇产科学   14174篇
基础医学   87235篇
口腔科学   15140篇
临床医学   46136篇
内科学   98334篇
皮肤病学   12604篇
神经病学   37173篇
特种医学   19197篇
外国民族医学   72篇
外科学   81059篇
综合类   9082篇
现状与发展   1篇
一般理论   138篇
预防医学   40499篇
眼科学   12786篇
药学   42482篇
中国医学   1153篇
肿瘤学   29493篇
  2021年   4368篇
  2018年   6114篇
  2016年   4802篇
  2015年   5332篇
  2014年   7069篇
  2013年   10797篇
  2012年   14596篇
  2011年   16013篇
  2010年   9197篇
  2009年   8520篇
  2008年   14792篇
  2007年   15881篇
  2006年   15967篇
  2005年   15224篇
  2004年   14883篇
  2003年   14103篇
  2002年   13937篇
  2001年   24348篇
  2000年   25347篇
  1999年   20819篇
  1998年   5576篇
  1997年   4808篇
  1996年   5135篇
  1995年   4721篇
  1994年   4378篇
  1992年   15837篇
  1991年   16414篇
  1990年   16515篇
  1989年   15883篇
  1988年   14657篇
  1987年   14500篇
  1986年   13681篇
  1985年   13041篇
  1984年   9687篇
  1983年   8323篇
  1982年   4590篇
  1979年   9491篇
  1978年   6892篇
  1977年   5818篇
  1976年   5640篇
  1975年   6438篇
  1974年   7670篇
  1973年   7156篇
  1972年   6982篇
  1971年   6705篇
  1970年   6184篇
  1969年   5901篇
  1968年   5569篇
  1967年   5022篇
  1966年   4458篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
BackgroundTotal hip and knee arthroplasties are increasingly performed operations, and routine follow-up places huge demands on orthopedic services. This study investigates the effectiveness, patients’ satisfaction, and cost reduction of Virtual Joint Replacement Clinic (VJRC) follow-up of total hip arthroplasty and total knee arthroplasty patients in a university hospital. VJRC is especially valuable when in-person appointments are not advised or feasible such as during the COVID-19 pandemic.MethodsA total of 1749 patients who were invited for VJRC follow-up for knee or hip arthroplasty from January 2017 to December 2018 were included in this retrospective study. Patients were referred to VJRC after their 6-week postoperative review. Routine VJRC postoperative review was undertaken at 1 and 7 years and then 3-yearly thereafter. We evaluated the VJRC patient response rate, acceptability, and outcome. Patient satisfaction was measured in a subgroup of patients using a satisfaction survey. VJRC costs were calculated compared to face-to-face follow-up.ResultsThe VJRC had a 92.05% overall response rate. Only 7.22% required further in-person appointments with only 3% being reviewed by an orthopedic consultant. VJRC resulted in an estimated saving of £42,644 per year at our institution. The patients’ satisfaction survey showed that 89.29% of the patients were either satisfied or very satisfied with VJRC follow-up.ConclusionVJRC follow-up for hip and knee arthroplasty patients is an effective alternative to in-person clinic assessment which is accepted by patients, has high patient satisfaction, and can reduce the cost to both health services and patients.  相似文献   
4.
Major depressive disorder and other neuropsychiatric disorders are often managed with long-term use of antidepressant medication. Fluoxetine, an SSRI antidepressant, is widely used as a first-line treatment for neuropsychiatric disorders. However, fluoxetine has also been shown to increase the risk of metabolic diseases such as non-alcoholic fatty liver disease. Fluoxetine has been shown to increase hepatic lipid accumulation in vivo and in vitro. In addition, fluoxetine has been shown to alter the production of prostaglandins which have also been implicated in the development of non-alcoholic fatty liver disease. The goal of this study was to assess the effect of fluoxetine exposure on the prostaglandin biosynthetic pathway and lipid accumulation in a hepatic cell line (H4-II-E-C3 cells). Fluoxetine treatment increased mRNA expression of prostaglandin biosynthetic enzymes (Ptgs1, Ptgs2, and Ptgds), PPAR gamma (Pparg), and PPAR gamma downstream targets involved in fatty acid uptake (Cd36, Fatp2, and Fatp5) as well as production of 15-deoxy-Δ12,14PGJ2 a PPAR gamma ligand. The effects of fluoxetine to induce lipid accumulation were attenuated with a PTGS1 specific inhibitor (SC-560), whereas inhibition of PTGS2 had no effect. Moreover, SC-560 attenuated 15-deoxy-Δ12,14PGJ2 production and expression of PPAR gamma downstream target genes. Taken together these results suggest that fluoxetine-induced lipid abnormalities appear to be mediated via PTGS1 and its downstream product 15d-PGJ2 and suggest a novel therapeutic target to prevent some of the adverse effects of fluoxetine treatment.  相似文献   
5.
6.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
7.
8.
9.
Lasers in Medical Science - Melasma is a chronic, dark brown–pigmented patches and macules commonly on the face. Many treatment modalities for melasma have been used as hydroquinone, laser...  相似文献   
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