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   7411篇
  免费   678篇
  国内免费   51篇
耳鼻咽喉   75篇
儿科学   312篇
妇产科学   299篇
基础医学   1069篇
口腔科学   141篇
临床医学   716篇
内科学   1494篇
皮肤病学   250篇
神经病学   712篇
特种医学   349篇
外国民族医学   1篇
外科学   1101篇
综合类   74篇
一般理论   5篇
预防医学   591篇
眼科学   163篇
药学   369篇
中国医学   12篇
肿瘤学   407篇
  2023年   41篇
  2022年   26篇
  2021年   176篇
  2020年   95篇
  2019年   193篇
  2018年   240篇
  2017年   163篇
  2016年   168篇
  2015年   214篇
  2014年   242篇
  2013年   301篇
  2012年   406篇
  2011年   421篇
  2010年   295篇
  2009年   270篇
  2008年   350篇
  2007年   376篇
  2006年   329篇
  2005年   316篇
  2004年   264篇
  2003年   235篇
  2002年   215篇
  2001年   228篇
  2000年   239篇
  1999年   218篇
  1998年   109篇
  1997年   113篇
  1996年   107篇
  1995年   81篇
  1994年   82篇
  1993年   67篇
  1992年   135篇
  1991年   132篇
  1990年   116篇
  1989年   124篇
  1988年   165篇
  1987年   108篇
  1986年   111篇
  1985年   94篇
  1984年   62篇
  1983年   42篇
  1982年   36篇
  1981年   37篇
  1980年   34篇
  1979年   42篇
  1978年   30篇
  1977年   34篇
  1976年   46篇
  1974年   40篇
  1973年   26篇
排序方式: 共有8140条查询结果,搜索用时 15 毫秒
1.
2.
3.
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   
4.
5.
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   
6.
Oral allergy syndrome induced by spinach   总被引:1,自引:1,他引:0  
  相似文献   
7.
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   
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