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   14858篇
  免费   857篇
  国内免费   58篇
耳鼻咽喉   106篇
儿科学   565篇
妇产科学   337篇
基础医学   2171篇
口腔科学   423篇
临床医学   1477篇
内科学   3094篇
皮肤病学   273篇
神经病学   1427篇
特种医学   368篇
外科学   1492篇
综合类   88篇
一般理论   9篇
预防医学   1265篇
眼科学   263篇
药学   1040篇
中国医学   69篇
肿瘤学   1306篇
  2023年   101篇
  2022年   181篇
  2021年   421篇
  2020年   272篇
  2019年   382篇
  2018年   454篇
  2017年   299篇
  2016年   347篇
  2015年   452篇
  2014年   590篇
  2013年   811篇
  2012年   1182篇
  2011年   1231篇
  2010年   642篇
  2009年   585篇
  2008年   934篇
  2007年   1009篇
  2006年   935篇
  2005年   882篇
  2004年   769篇
  2003年   759篇
  2002年   704篇
  2001年   140篇
  2000年   102篇
  1999年   142篇
  1998年   131篇
  1997年   118篇
  1996年   77篇
  1995年   86篇
  1994年   74篇
  1993年   58篇
  1992年   73篇
  1991年   72篇
  1990年   60篇
  1989年   38篇
  1988年   47篇
  1987年   31篇
  1986年   42篇
  1985年   42篇
  1984年   47篇
  1983年   48篇
  1982年   44篇
  1981年   46篇
  1980年   39篇
  1979年   33篇
  1978年   30篇
  1976年   20篇
  1975年   21篇
  1973年   18篇
  1972年   17篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Neorickettsia helminthoeca (NH), the agent of salmon poisoning disease or canine neorickettiosis (CN), is a bacterial endosymbiont of the nematode Nanophyetus salmincola, and infections are spreading among specific fish‐eating mammalians. This article describes the pathologic and immunohistochemical findings associated with spontaneous NH‐induced infections in dogs from Southern Brazil. The principal pathologic findings were hypertrophy of Peyer patches and lymphadenopathy with lymphocytic proliferation, chronic interstitial pneumonia, and chronic enteritis associated with positive intralesional immunoreactivity to antigens of NH within macrophages and histiocytes. Positive immunoreactivity against canine parvovirus‐2 (CPV‐2) or/and canine distemper virus was not detected in the evaluated intestinal segments or in the samples from the cerebellum and lungs, respectively, from the dogs evaluated. These findings demonstrated that NH was involved in the enteric, pulmonary, and lymphoid lesions herein described, and provide additional information to confirm the occurrence of this bacterial endosymbiont within this geographical location. It is proposed that chronic pneumonia should be considered as a pathologic manifestation of NH‐induced infections. Additionally, our results show that the occurrences of CN seem to be underdiagnosed in Southern Brazil due to the confusion with the incidence of CPV‐2.  相似文献   
3.
Depigmented lesions may occur as postinflammatory sequelae of subacute cutaneous lupus erythematosus (SCLE), leading to great psychosocial impact. A 53‐year‐old male patient presented with post‐SCLE depigmented facial lesions after five years of disease stability. We proposed surgical treatment with melanocyte‐keratinocyte transplantation procedure (MKTP), and after five months the patient achieved 90% repigmentation, without Koebner phenomenon (KP). In theory, KP is a possible complication of MKTP procedure since the preparation of the receptor area involves the use of dermabrasion. In an attempt to avoid it, we suggest to maintain the treatment of the underlying disease and wait for a minimum period of disease stability before the procedure.  相似文献   
4.
5.
Henoch‐Schonlein purpura (HSP) is the most common systemic vasculitis in childhood. There is no consensus about the management for isolated cutaneous manifestations in HSP. We describe a case of HSP presenting with severe skin lesions that did not respond to standard therapy with corticosteroids. The 11‐year‐old child was treated with intravenous immunoglobulins, which induced rapid and persistent resolution of symptomatology.  相似文献   
6.
7.
8.
9.

Objective

The aim of this paper is to study the opportunity costs (OC) that are involved in being a caregiver and to compare them with the direct costs assumed by the State and the families. We evaluate direct cost (those that imply a payment-out-of-pocket) and indirect cost (those that imply a dedication in time). We hypothesized that costs increase with the severity of the dementia, with the educational level and active occupational situation of caregiver. They are greater if the caregiver is male, but if the patient and caregiver cohabit they are reduced.

Method

778 surveys were analyzed. Data was collected using a questionnaire specifically designed for the purpose, with the collaboration of Alzheimer's Diseases Associations in Andalusia (Spain). For the indirect cost, we used the reveal preferences method. For the comparison between groups an ANOVA and a MANOVA was done.

Results

The hypotheses were confirmed. The OC exponentially increases with severity. More than 55% of costs are assumed by families. Occupied people have higher educational level and incomes and contract more external support. Costs are significantly higher for male caregivers. Cohabiting reduces all kinds of costs.

Conclusions

The relationship between educational level and employment situation lead to think that if these variables are greater more people will seek professional support. Cultural reasons still maintain women as main caregivers for all educational levels. The existence of these informal caregivers as the main care providers is a saving for the State, and a brake for the development of professional supply.  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