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   3612663篇
  免费   261881篇
  国内免费   9459篇
耳鼻咽喉   48826篇
儿科学   120003篇
妇产科学   99395篇
基础医学   508443篇
口腔科学   102131篇
临床医学   331418篇
内科学   705413篇
皮肤病学   85373篇
神经病学   292831篇
特种医学   137211篇
外国民族医学   941篇
外科学   540331篇
综合类   77801篇
现状与发展   8篇
一般理论   1393篇
预防医学   277121篇
眼科学   83866篇
药学   264109篇
  12篇
中国医学   7987篇
肿瘤学   199390篇
  2019年   28705篇
  2018年   40950篇
  2017年   31251篇
  2016年   35522篇
  2015年   40204篇
  2014年   55617篇
  2013年   83184篇
  2012年   112039篇
  2011年   118615篇
  2010年   70999篇
  2009年   67364篇
  2008年   110325篇
  2007年   117436篇
  2006年   119055篇
  2005年   114189篇
  2004年   109874篇
  2003年   105670篇
  2002年   102070篇
  2001年   175758篇
  2000年   179892篇
  1999年   151293篇
  1998年   43004篇
  1997年   37874篇
  1996年   38005篇
  1995年   36858篇
  1994年   33691篇
  1993年   31563篇
  1992年   117095篇
  1991年   112936篇
  1990年   109316篇
  1989年   105606篇
  1988年   96573篇
  1987年   94591篇
  1986年   88806篇
  1985年   84787篇
  1984年   63213篇
  1983年   53639篇
  1982年   31461篇
  1981年   28048篇
  1979年   55913篇
  1978年   39254篇
  1977年   33410篇
  1976年   31146篇
  1975年   32958篇
  1974年   39316篇
  1973年   37579篇
  1972年   35095篇
  1971年   32572篇
  1970年   30103篇
  1969年   28767篇
排序方式: 共有10000条查询结果,搜索用时 17 毫秒
41.
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   
42.
Troppmair  Teresa  Egger  J.  Krösbacher  A.  Zanvettor  A.  Schinnerl  A.  Neumayr  A.  Baubin  M. 《Der Anaesthesist》2022,71(4):272-280
Die Anaesthesiologie - Die Qualität eines Rettungssystems zeichnet sich auch durch den effizienten Einsatz seiner personellen und Fahrzeugressourcen aus. So können im berechtigten Fall...  相似文献   
43.
44.
45.
Introduction: The Hedgehog (HH) pathway constitutes a collection of signaling molecules which critically influence embryogenesis. In adults, however, the HH pathway remains integral to the proliferation, maintenance, and apoptosis of adult stem cells including hematopoietic stem cells.

Areas covered: We discuss the current understanding of the HH pathway as it relates to normal hematopoiesis, the pathology of acute myeloid leukemia (AML), the rationale for and data from combination therapies including HH pathway inhibitors, and ultimately the prospects that might offer promise in targeting this pathway in AML.

Expert opinion: Efforts to target the HH pathway have been focused on impeding this disposition and restoring chemosensitivity to conventional myeloid neoplasm therapies. The year 2018 saw the first approval of a HH pathway inhibitor (glasdegib) for AML, though for an older population and in combination with an uncommonly-used therapy. Several other clinical trials with agents targeting modulators of HH signaling in AML and MDS are underway. Further study and understanding of the interplay between the numerous aspects of HH signaling and how it relates to the augmented survival of AML will provide a more reliable substrate for therapeutic strategies in patients with this poor-risk disease.  相似文献   

46.
Adjuvant irradiation is the standard treatment after breast conservative surgery. Normofractionated regimen with an overall treatment time of 5 to 6 weeks is often considered as a limiting factor for irradiation compliance. In order to answer this issue, moderate and more recently extreme hypofractionated protocols appeared. We report here oncological outcomes and toxicity of hypofractionated breast irradiation. After defining the frame of moderate and extreme hypofractionated breast irradiations based on overall treatment time, patient selection criteria were listed. According to their levels of proof, the results of moderate and extreme hypofractionated breast irradiation were analysed. Overall treatment time for moderate hypofractionated breast irradiation ranged from 3 to 4 weeks, while for extreme hypofractionated breast irradiation, it was less than 1 week. For moderate hypofractionated breast irradiation, whole breast irradiation was currently performed with or without lymph node irradiation. Moderate hypofractionated breast irradiation has proven to be as safe and as efficient as normofractionated breast irradiation with level IA evidence. For extreme hypofractionated breast irradiation, phase III randomized trials confirmed that accelerated partial breast irradiation was non-inferior in terms of local control compared to normofractionated whole breast irradiation (with external beam radiation therapy and multicatheter brachytherapy), with similar acute and late toxicity. While the use of intraoperative breast irradiation remains under debate, new very accelerated partial breast irradiation (overall treatment time not exceeding 2 days) protocols emerged with encouraging results. Accelerated partial breast irradiation is warranted for extreme hypofractionated breast irradiation and is indicated for low-risk breast cancers. Moderate and extreme hypofractionated breast irradiation regimens are validated and can be routinely proposed according to patient selection criteria.  相似文献   
47.
48.
49.
50.
We review the spectrum of cutaneous disorders associated with inflammatory and neoplastic plasmacytic pathology. Because plasma cells are derived from B‐lymphocytes our overview includes discussion of certain lymphoplasmacytic proliferations. It is structured along histopathological lines, addressing conditions characterized by (a) cutaneous plasma cell infiltrates, (b) deposits of plasma cell products or their derivatives in the skin and (c) miscellaneous, poorly understood cutaneous complications of plasmacytic disorders. Lesions arising primarily in the skin and those due to cutaneous involvement by multisystem disorders are addressed. The range includes a spectrum of tumefactive and circulatory manifestations. We highlight key clinical and pathological features of the different conditions and outline recent advances in our understanding of these entities. By emphasizing the dermatopathological characteristics of this spectrum of disorders we hope to hone the diagnostic accuracy of practitioners in the field.  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