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   7938篇
  免费   684篇
  国内免费   97篇
耳鼻咽喉   71篇
儿科学   312篇
妇产科学   305篇
基础医学   1130篇
口腔科学   136篇
临床医学   843篇
内科学   1651篇
皮肤病学   261篇
神经病学   725篇
特种医学   465篇
外国民族医学   1篇
外科学   1126篇
综合类   76篇
一般理论   5篇
预防医学   596篇
眼科学   155篇
药学   409篇
中国医学   11篇
肿瘤学   441篇
  2023年   41篇
  2022年   68篇
  2021年   179篇
  2020年   93篇
  2019年   196篇
  2018年   231篇
  2017年   160篇
  2016年   168篇
  2015年   215篇
  2014年   242篇
  2013年   301篇
  2012年   402篇
  2011年   426篇
  2010年   302篇
  2009年   278篇
  2008年   357篇
  2007年   413篇
  2006年   331篇
  2005年   308篇
  2004年   262篇
  2003年   245篇
  2002年   224篇
  2001年   232篇
  2000年   250篇
  1999年   226篇
  1998年   155篇
  1997年   156篇
  1996年   168篇
  1995年   132篇
  1994年   130篇
  1993年   106篇
  1992年   145篇
  1991年   148篇
  1990年   136篇
  1989年   134篇
  1988年   158篇
  1987年   116篇
  1986年   130篇
  1985年   98篇
  1984年   69篇
  1983年   61篇
  1982年   50篇
  1981年   50篇
  1980年   43篇
  1979年   41篇
  1978年   34篇
  1977年   42篇
  1976年   47篇
  1974年   41篇
  1973年   26篇
排序方式: 共有8719条查询结果,搜索用时 15 毫秒
1.
2.
Introduction and objectivesBiological aerosols play a vital role in the interactions between the atmosphere, biosphere, climate and public health and fungal spores are a component with allergic importance.We constructed a database in Castile & Leon (Spain) and carry out molecular-level component-resolved diagnosis to complete the air quality study carried out since 2006 by our aerobiological network (RACYL) to aid clinical diagnosis and treatment.MethodsWe reviewed a database of 19,774 patients (adults and children) with allergic respiratory disease treated in our unit during the last 12 years. We also made a component-resolved diagnosis of the molecules involved in the pathology in a randomly selected population of 150 patients.ResultsThe dimeric glycoprotein Alt a1 from Alternaria is the most prevalent and most useful allergen in the diagnosis of patients with allergy to fungi in our area (94.4%), followed by enolase Alt a 6 (Alternaria), ribonuclease Asp f 1 of Aspergillus and mannitol dehydrogenase from Cla h 8 (Cladosporium).ConclusionsOur results have helped determine which spore molecules are most-closely associated with allergies. Molecular analysis will be useful to determine more accurate and useful immunotherapy in these patients.  相似文献   
3.
Campath-1H (alemtuzumab) induction was used for renal transplantation in combination with sirolimus as immunosuppression. We previously reported a high (28%) rate of early rejection with this regimen, and now report 3-year outcomes. Twenty-nine patients were recipients of either deceased donor or non-HLA (Human Leukocyte Antigen) identical living donor primary renal allografts. Clinical parameters including infection, malignancy, kidney function, and kidney histology were followed prospectively for 3 years. Three-year cumulative graft and patient survival were 96% and 100%, respectively. Twenty patients were maintained on steroid-free immunosuppressive regimens, and 15 patients were maintained on monotherapy for immunosuppression (12 on sirolimus). No serious infectious complications were observed and two patients developed basal cell skin cancer. The 3-year results of our initial pilot study demonstrate good graft (96%) and patient (100%) outcomes. Campath-1H induction has yielded a high proportion of patients maintained on immunosuppressive monotherapy (57%) without serious infectious- and no malignancy-related complications. The reported regimen yielded novel insights into both Campath-1H and sirolimus therapy in renal transplantation. Because of the higher incidence of early rejection, we recommend a modified strategy of immunosuppression including a brief course of a calcineurin inhibitor.  相似文献   
4.
Oral allergy syndrome induced by spinach   总被引:1,自引:1,他引:0  
  相似文献   
5.
We report a case of vasoactive-agent-induced priapism successfully treated in the emergency department with 10 mg of metaraminol injected into the corpora cavernosa.  相似文献   
6.
7.
8.
9.
Research on physical activity (PA) by level of acculturation in Hispanic children is limited and findings have been mixed. We examined PA participation by primary language used with parents in a representative sample of 4th, 8th, and 11th grade Texas public school students. Mixed-effects regression models were conducted using cross-sectional data from the 2004–2005 School Physical Activity and Nutrition Study (n = 22,049). Self-reported PA was compared among three language-ethnic groups: Spanish-Hispanic (SH) (referent); English-Hispanic (EH); and English-Other (EO). EH and/or EO girls were generally between 1.25 and 2.58 [OR] times more likely to participate in PA across grade levels, with the largest differences found for school sports in 8th grade girls. EH and EO 8th grade boys were 1.71 (CI: 1.40, 2.10) and 2.06 (CI: 1.68, 2.51) times, respectively, more likely to participate in school sports. Findings indicate important disparities in Spanish-speaking Hispanic children’s PA participation.  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