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   4476篇
  免费   322篇
  国内免费   22篇
耳鼻咽喉   47篇
儿科学   92篇
妇产科学   95篇
基础医学   613篇
口腔科学   320篇
临床医学   392篇
内科学   1042篇
皮肤病学   86篇
神经病学   388篇
特种医学   102篇
外科学   472篇
综合类   10篇
预防医学   518篇
眼科学   61篇
药学   396篇
中国医学   20篇
肿瘤学   166篇
  2023年   54篇
  2022年   88篇
  2021年   199篇
  2020年   113篇
  2019年   159篇
  2018年   185篇
  2017年   136篇
  2016年   151篇
  2015年   169篇
  2014年   198篇
  2013年   264篇
  2012年   366篇
  2011年   427篇
  2010年   196篇
  2009年   157篇
  2008年   281篇
  2007年   263篇
  2006年   217篇
  2005年   241篇
  2004年   140篇
  2003年   150篇
  2002年   139篇
  2001年   89篇
  2000年   66篇
  1999年   62篇
  1998年   22篇
  1997年   23篇
  1996年   20篇
  1995年   14篇
  1994年   20篇
  1993年   10篇
  1992年   21篇
  1991年   27篇
  1990年   16篇
  1989年   20篇
  1988年   11篇
  1987年   9篇
  1986年   13篇
  1985年   6篇
  1984年   11篇
  1983年   6篇
  1982年   6篇
  1981年   4篇
  1979年   9篇
  1975年   5篇
  1974年   4篇
  1973年   4篇
  1970年   4篇
  1968年   3篇
  1967年   3篇
排序方式: 共有4820条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
Drug‐induced reactions are complications associated with high mortality and significant morbidity. Stevens–Johnson Syndrome (SJS) and toxic epidermal necrolysis (TEN) are examples of these conditions, which are characterized by skin and mucous lesions. Here, we report a case of a 9‐year‐old girl who presented with blisters associated with an extensive vesicular rash and multiple ulcerations on the lips and oral cavity. A drug‐induced hypersensitivity reaction to antibiotics was suspected, and a diagnosis of TEN was made. The patient was managed with withdrawal of the suspected causative agent, and the oral lesions were treated with low‐level laser therapy (LLLT) and oral hygiene. This case highlights that TEN requires interdisciplinary intervention with dental assistance and follow‐up to improve symptoms, nutrition, systemic condition, and quality of life.  相似文献   
5.
L1 disease is the most common genetic cause of congenital hydrocephalus. Mutations in the L1CAM gene are associated with an overlapping clinical spectrum of four X-linked neurological conditions, characterized by hydrocephalus, mental retardation, lower limb spasticity and adducted thumbs. Brain anomalies are frequently present in L1 disease. We describe these anomalies by reporting a case of a male newborn presenting with congenital hydrocephalus along with corpus callosum agenesis and enlargement of the massa intermedia. These findings, in association with the presence of clasped thumbs, raised the suspicion of L1 disease, which was confirmed by the detection of a mutation in the L1CAM gene. In cases of congenital hydrocephalus, recognition of the brain anomalies associated with L1 disease may contribute to pursuing the genetic analysis needed for the diagnosis and genetic counseling.  相似文献   
6.
OBJECTIVE: The authors tested the effect of blood sampling (skin versus venous puncture) on some biochemical and hematological blood parameters in athletes to answer whether skin puncture could be used as a substitute for venous puncture. DESIGN: Comparative study of 2 methods of blood samples collection. SETTING: The blood was collected in the same athletes at 3 different moments of the preparatory training phase. PARTICIPANTS: Fourteen male indoor soccer players (22 +/- 1 years old) and 7 female handball players (18 +/- 1 years old) participated. MAIN OUTCOME MEASUREMENT: Blood was collected in heparin and K3EDTA by Vacutainer BD or Microvette Sarstedt system for biochemical and hematological analyses, respectively. RESULTS: There were no significant statistical differences between the 2 methods for the values of creatine kinase, urea, creatinine, lymphocytes, and platelets. The other hematological analyzes and uric acid exhibited significant higher values in skin blood, although they were all within the normal expected range. A high degree of correlation was observed between the 2 techniques for all parameters. CONCLUSIONS: Skin puncture is a reliable, easy, accurate, and less invasive sampling method for assessing hematological and some biochemical parameters in athletes, respecting that blood samples should always be obtained from the same site, especially in follow-up studies.  相似文献   
7.
8.
9.
Investigations were carried out on the radiation-induced graft copolymerization by direct irradiation of dimethylaminoethyl methacrylate on to poly(bis(trifluoroethoxy)phosphazene) and on to poly (bis(phenoxy)phosphazene). Kinetics of grafting were followed with the polyphosphazenes immersed in monomer - methanol mixtures of various composition. The grafted film samples were quaternized with methyl iodide and, to the produced ammonium group, heparin was ionically bonded with high yield. On the grafted and heparinized-grafted film samples an evaluation of hydrophilicity, mechanical properties, biocompatibility and anticoagulating properties was carried out.  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