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   3598842篇
  免费   303887篇
  国内免费   23152篇
耳鼻咽喉   49583篇
儿科学   108381篇
妇产科学   92648篇
基础医学   562018篇
口腔科学   98727篇
临床医学   324110篇
内科学   636169篇
皮肤病学   94281篇
神经病学   305498篇
特种医学   143387篇
外国民族医学   531篇
外科学   557032篇
综合类   126539篇
现状与发展   64篇
一般理论   2310篇
预防医学   289949篇
眼科学   83052篇
药学   255752篇
  110篇
中国医学   17225篇
肿瘤学   178515篇
  2021年   61009篇
  2020年   39675篇
  2019年   61915篇
  2018年   75029篇
  2017年   57477篇
  2016年   63035篇
  2015年   78822篇
  2014年   114248篇
  2013年   178783篇
  2012年   101239篇
  2011年   101270篇
  2010年   121872篇
  2009年   125596篇
  2008年   85606篇
  2007年   89163篇
  2006年   99607篇
  2005年   95012篇
  2004年   94876篇
  2003年   85794篇
  2002年   75360篇
  2001年   111278篇
  2000年   104583篇
  1999年   103657篇
  1998年   66804篇
  1997年   64697篇
  1996年   61968篇
  1995年   57307篇
  1994年   51377篇
  1993年   47741篇
  1992年   72556篇
  1991年   68692篇
  1990年   65564篇
  1989年   64856篇
  1988年   60663篇
  1987年   59201篇
  1986年   56655篇
  1985年   56218篇
  1984年   50592篇
  1983年   45873篇
  1982年   42383篇
  1981年   39866篇
  1980年   37677篇
  1979年   42983篇
  1978年   37359篇
  1977年   34281篇
  1976年   31044篇
  1975年   30699篇
  1974年   32419篇
  1973年   31087篇
  1972年   29503篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
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   
64.
65.
66.
67.
68.
69.
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   
70.
Over the last 40 years, the incidence and prevalence of gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) have continued to increase. Compared to other epithelial neoplasms in the same organ, GEP-NENs exhibit indolent biological behavior, resulting in more chances to undergo surgery. However, the role of surgery in high-grade or advanced GEP-NENs is still controversial. Surgery is associated with survival improvement of well-differentiated high-grade GEP-NENs, whereas poorly differentiated GEP-NENs that may benefit from resection require careful selection based on Ki67 and other tissue biomarkers. Additionally, surgery also plays an important role in locally advanced and metastatic disease. For locally advanced GEP-NENs, isolated major vascular involvement is no longer an absolute contraindication. In the setting of metastatic GEP-NENs, radical intended surgery is recommended for patients with low-grade and resectable metastases. For unresectable metastatic disease, a variety of surgical approaches, including cytoreduction of liver metastasis, liver transplantation, and surgery after neoadjuvant treatment, show survival benefits. Primary tumor resection in GEP-NENs with unresectable metastatic disease is associated with symptom control, prolonged survival, and improved sensitivity toward systemic therapies. Although there is no established neoadjuvant or adjuvant strategy, increasing attention has been given to this emerging research area. Some studies have reported that neoadjuvant therapy effectively reduces tumor burden, improves the effectiveness of subsequent surgery, and decreases surgical complications.  相似文献   
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