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   1341613篇
  免费   115014篇
  国内免费   6367篇
耳鼻咽喉   16765篇
儿科学   43204篇
妇产科学   36724篇
基础医学   184507篇
口腔科学   36605篇
临床医学   121138篇
内科学   279348篇
皮肤病学   32104篇
神经病学   111058篇
特种医学   55795篇
外国民族医学   274篇
外科学   211211篇
综合类   31562篇
现状与发展   2篇
一般理论   424篇
预防医学   106836篇
眼科学   28098篇
药学   94016篇
  5篇
中国医学   2235篇
肿瘤学   71083篇
  2018年   13465篇
  2017年   10702篇
  2016年   12885篇
  2015年   14394篇
  2014年   20074篇
  2013年   29910篇
  2012年   36529篇
  2011年   39162篇
  2010年   24541篇
  2009年   24075篇
  2008年   36629篇
  2007年   39052篇
  2006年   40145篇
  2005年   38761篇
  2004年   36956篇
  2003年   36046篇
  2002年   34089篇
  2001年   66265篇
  2000年   68097篇
  1999年   56742篇
  1998年   16799篇
  1997年   15079篇
  1996年   16074篇
  1995年   16279篇
  1994年   15141篇
  1993年   14198篇
  1992年   47188篇
  1991年   45830篇
  1990年   44049篇
  1989年   41907篇
  1988年   38841篇
  1987年   38178篇
  1986年   35945篇
  1985年   34707篇
  1984年   26424篇
  1983年   22172篇
  1982年   13891篇
  1981年   12486篇
  1980年   11744篇
  1979年   23581篇
  1978年   17113篇
  1977年   14427篇
  1976年   13225篇
  1975年   13758篇
  1974年   16128篇
  1973年   15439篇
  1972年   14210篇
  1971年   13080篇
  1970年   11916篇
  1969年   11144篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
181.
182.
Nickel is the leading cause of allergic contact dermatitis (ACD) from early childhood through adolescence. Studies have shown that skin piercings and other nickel‐laden exposures can trigger the onset of nickel ACD in those who are susceptible. Nickel ACD causes a vast amount of cutaneous disease in children. Cases of nickel ACD in children have been reported in peer‐reviewed literature from 28 states. Common items that contain inciting nickel include jewelry, coins, zippers, belts, tools, toys, chair studs, cases for cell phones and tablets, and dental appliances. The diagnosis of nickel ACD has been routinely confirmed by patch testing in children older than 6 months suspected of ACD from nickel. Unlike in Europe, there are no mandatory restrictions legislated for nickel exposure in the United States. Denmark has demonstrated that regulation of the nickel content in metals can lower the risk of ACD and the associated health care–related costs that arise from excess nickel exposure. To further awareness, this article reviews the prominent role of nickel in pediatric skin disease in the United States. It discusses the need for a campaign by caretakers to reduce nickel‐related morbidity. Lastly, it promotes the model of European legislation as a successful intervention in the prevention of nickel ACD.  相似文献   
183.
A 3‐year‐old Arab boy with a history of hypoplastic left heart syndrome was referred to the pediatric dermatology clinic at Sheba Medical Center for evaluation of hypomelanosis, manifested by fair skin pigmentation and silvery‐grey hair, eyebrows, and eyelashes. The child had one older brother with similar hypopigmentation and another older brother who had died of congenital heart disease. The child had no history of neurologic deficits or immunodeficiency and no additional findings on clinical evaluation.  相似文献   
184.
185.
186.
187.
188.
189.
190.
BackgroundNeoadjuvant yttrium-90 transarterial radioembolization (TARE) is increasingly being used as a strategy to facilitate resection of otherwise unresectable tumors due to its ability to generate both tumor response and remnant liver hypertrophy. Perioperative outcomes after the use of neoadjuvant lobar TARE remain underinvestigated.MethodsA single center retrospective review of patients who underwent lobar TARE prior to major hepatectomy for primary or metastatic liver cancer between 2007 and 2018 was conducted. Baseline demographics, radioembolization parameters, pre- and post-radioembolization volumetrics, intra-operative surgical data, adverse events, and post-operative outcomes were analyzed.ResultsTwenty-six patients underwent major hepatectomy after neoadjuvant lobar TARE. The mean age was 58.3 years (17–88 years). 62% of patients (n=16) had primary liver malignancies while the remainder had metastatic disease. Liver resection included right hepatectomy or trisegmentectomy, left or extended left hepatectomy, and sectorectomy/segmentectomy in 77% (n=20), 8% (n=2), and 15% (n=4) of patients, respectively. The mean length of stay was 8.3 days (range, 3–33 days) and there were no grade IV morbidities or 90-day mortalities. The incidence of post hepatectomy liver failure (PHLF) was 3.8% (n=1). The median time to progression after resection was 4.5 months (range, 3.3–10 months). Twenty-three percent (n=6) of patients had no recurrence. The median survival was 28.9 months (range, 16.9–46.8 months) from major hepatectomy and 37.6 months (range, 25.2–53.1 months) from TARE.ConclusionsMajor hepatectomy after neoadjuvant lobar radioembolization is safe with a low incidence of PHLF.  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