全文获取类型
收费全文 | 53751篇 |
免费 | 3504篇 |
国内免费 | 171篇 |
专业分类
耳鼻咽喉 | 630篇 |
儿科学 | 1499篇 |
妇产科学 | 1071篇 |
基础医学 | 7799篇 |
口腔科学 | 3732篇 |
临床医学 | 4495篇 |
内科学 | 10461篇 |
皮肤病学 | 1115篇 |
神经病学 | 4324篇 |
特种医学 | 1697篇 |
外国民族医学 | 27篇 |
外科学 | 6279篇 |
综合类 | 594篇 |
一般理论 | 14篇 |
预防医学 | 6353篇 |
眼科学 | 663篇 |
药学 | 4042篇 |
中国医学 | 398篇 |
肿瘤学 | 2233篇 |
出版年
2023年 | 363篇 |
2022年 | 781篇 |
2021年 | 1563篇 |
2020年 | 1076篇 |
2019年 | 1362篇 |
2018年 | 1614篇 |
2017年 | 1203篇 |
2016年 | 1274篇 |
2015年 | 1501篇 |
2014年 | 1959篇 |
2013年 | 2408篇 |
2012年 | 3577篇 |
2011年 | 3916篇 |
2010年 | 2041篇 |
2009年 | 1641篇 |
2008年 | 2840篇 |
2007年 | 2792篇 |
2006年 | 2537篇 |
2005年 | 2262篇 |
2004年 | 2026篇 |
2003年 | 1895篇 |
2002年 | 1716篇 |
2001年 | 1294篇 |
2000年 | 1369篇 |
1999年 | 1100篇 |
1998年 | 427篇 |
1997年 | 295篇 |
1996年 | 267篇 |
1995年 | 286篇 |
1994年 | 307篇 |
1993年 | 352篇 |
1992年 | 869篇 |
1991年 | 799篇 |
1990年 | 704篇 |
1989年 | 543篇 |
1988年 | 507篇 |
1987年 | 447篇 |
1986年 | 401篇 |
1985年 | 431篇 |
1984年 | 328篇 |
1983年 | 249篇 |
1979年 | 280篇 |
1978年 | 229篇 |
1975年 | 213篇 |
1974年 | 264篇 |
1973年 | 246篇 |
1971年 | 194篇 |
1970年 | 213篇 |
1969年 | 207篇 |
1967年 | 193篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Rizzo Manglio Miguel Bluthgen Mara Virginia Recondo Gonzalo Naveira Martin Perfetti Aldo Rizzi Florencia Kuzminin Alejandro Faura Victoria Cerini Matas Videla Alejandro Silva Carlos Lupinacci Lorena Minatta Nicols 《International journal of clinical oncology / Japan Society of Clinical Oncology》2021,26(6):1057-1064
International Journal of Clinical Oncology - Immune-checkpoint inhibitors (ICIs) are standard treatments for metastatic non-small cell lung cancer (NSCLC). Patients with poor performance status... 相似文献
2.
3.
4.
5.
Selwyn Arlington Headley Nayara Emily Viana Mariana de Mello Zanim Michelazzo Ana Aparecida Correa Xavier Cícero Júlio Silva Costa Felipe Hideki Ogo de Pinho Marcelo Diniz dos Santos 《Transboundary and Emerging Diseases》2020,67(Z2):49-59
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
6.
AbstractGaining a better grasp on factors related to changes in alcohol use is of particular interest for clinicians. Past research has highlighted a negative link between future time perspective (i.e. a disposition guiding how individuals consider and act regarding their future) and alcohol misuse. However, much remains at stake in the understanding of this association. The objective of this research was to explore bidirectional relationships between future time perspective and severity of alcohol-related problems, in a clinical setting. The sample includes 79 patients followed up in an outpatient alcohol treatment centre. Two measurement times were planned: at entry into care and 6 months later. Multiple linear regression analyses were carried out, controlling for sociodemographic variables. We found that baseline future time perspective predicted level of alcohol-related problems after 6 months in treatment, even when effects of baseline alcohol-related problems and sociodemographic variables were controlled. This study shows that the way patients see and position themselves regarding their future can affect level of alcohol-related problems. It may be useful for clinicians to identify patients with low future time perspective to offer tailored interventions and consider this dimension as a resource for change. 相似文献
7.
8.
9.