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   1104694篇
  免费   71161篇
  国内免费   1768篇
耳鼻咽喉   15440篇
儿科学   31072篇
妇产科学   28585篇
基础医学   155518篇
口腔科学   33477篇
临床医学   94262篇
内科学   214003篇
皮肤病学   23289篇
神经病学   82703篇
特种医学   46425篇
外国民族医学   176篇
外科学   177849篇
综合类   19043篇
现状与发展   1篇
一般理论   237篇
预防医学   76689篇
眼科学   25179篇
药学   84674篇
  5篇
中国医学   2275篇
肿瘤学   66721篇
  2018年   12321篇
  2017年   10756篇
  2016年   10809篇
  2015年   13429篇
  2014年   16002篇
  2013年   20704篇
  2012年   33249篇
  2011年   29348篇
  2010年   16827篇
  2009年   17820篇
  2008年   26561篇
  2007年   28306篇
  2006年   29286篇
  2005年   36024篇
  2004年   36603篇
  2003年   31392篇
  2002年   26331篇
  2001年   58155篇
  2000年   58021篇
  1999年   51589篇
  1998年   11216篇
  1997年   9713篇
  1996年   9911篇
  1995年   9264篇
  1994年   8572篇
  1993年   7831篇
  1992年   41073篇
  1991年   39791篇
  1990年   38849篇
  1989年   37705篇
  1988年   34463篇
  1987年   33468篇
  1986年   31324篇
  1985年   29641篇
  1984年   20900篇
  1983年   17638篇
  1982年   8657篇
  1979年   19149篇
  1978年   12703篇
  1977年   10633篇
  1976年   9252篇
  1975年   10879篇
  1974年   13293篇
  1973年   12365篇
  1972年   11881篇
  1971年   11383篇
  1970年   10782篇
  1969年   10178篇
  1968年   9270篇
  1967年   8508篇
排序方式: 共有10000条查询结果,搜索用时 656 毫秒
121.
122.
FGFR–TACC, found in different tumor types, is characterized by the fusion of a member of fibroblast grown factor receptor (FGFR) tyrosine kinase (TK) family to a member of the transforming acidic coiled-coil (TACC) proteins. Because chromosome numerical alterations, hallmarks of FGFR–TACC fusions are present in many hematological disorders and there are no data on the prevalence, we studied a series of patients with acute myeloid leukemia and myelodysplastic syndrome who presented numerical alterations using cytogenetic traditional analysis. None of the analyzed samples showed FGFR3–TACC3 gene fusion, so screening for this mutation at diagnosis is not recommended.  相似文献   
123.
124.
125.
126.
Traditionally, major complications and unanticipated admission/readmission rates were used to assess outcome after day surgery. However, in view of the relative absence of major complications the quality of recovery (QOR) should be considered one of the principal endpoints after day surgery. In our study, the level of QOR is defined by a combination of the Global Surgical Recovery (GSR) Index and the Quality of Life (QOL).The aim of this study was to analyze prevalence and predictors of QOR after day surgery on the fourth postoperative day.Elective patients scheduled for day surgery from November 2008 to April 2010 were enrolled in a prospective cohort study. Outcome parameters were measured by using questionnaire packages at 2 time points: 1 week preoperatively and 4 days postoperatively. Primary outcome parameter is the QOR and is defined as good if the GSR index >80% as well as the postoperative QOL is unchanged or improved as compared with baseline. QOR is defined as poor if both the GSR index ≤80% and if the postoperative QOL is decreased as compared with baseline. QOR is defined as intermediate in all other cases. Three logistic regression analyses were performed to determine predictors for poor QOR after day surgery.A total of 1118 patients were included. A good QOR was noted in 17.3% of patients, an intermediate QOR in 34.8%, and a poor QOR in 47.8% 4 days after day surgery. The best predictor for poor QOR after day surgery was type of surgery. Other predictors were younger age, work status, and longer duration of surgery. A history of previous surgery, expected pain (by the patient) and high long-term surgical fear were significant predictors of poor QOR in only 1 of 3 prediction models.The QOR at home 4 days after day surgery was poor in the majority of patients and showed a significant procedure-specific variation. Patients at risk for poor QOR can be identified during the preoperative period based on type of surgery, age, work status, and the duration of the surgery.  相似文献   
127.
128.
Purpose/aim: To focus on current aspects of primary thyroid lymphoma (PTL), which is a rare clinical entity usually manifested by a rapidly growing mass in the neck that can cause pressure symptoms.

Materials and Methods: Relevant papers in PubMed published through June 2017 were selected to track updated information about PTL with an emphasis on diagnosis and novel therapeutic management.

Results: The most frequent cases include non-Hodgkin lymphoma derived from B-cells, mainly diffuse large B-cell lymphoma (DLBCL) followed by mucosa-associated lymphoid tissue (MALT) lymphoma or a mixed type. Other subtypes are less common. Lymphomas derived from T-cells and Hodgkin lymphomas are extremely rare. Hashimoto's autoimmune thyroiditis has been implicated as a risk factor for lymphoma. At the molecular level, the Wnt5a protein and its receptor Ror2 are involved in the course of the disease. Ultrasonography, fine needle aspiration (FNA) biopsy, and core or open biopsy combined with new diagnostic facilities contribute to an accurate diagnosis. An increased potential exists for a cure without the need for a radical surgical procedure. Modern chemoradiation therapy plus the monoclonal antibody rituximab, which acts against CD20, have limited the need for surgical interventions and provide an excellent outcome in most cases. However, some cases have resulted in treatment failure or recurrence.

Conclusions: A multidisciplinary approach must be used to define the management policy in each case. Future efforts by researchers are likely to be focused on the molecular level.  相似文献   

129.
130.
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