全文获取类型
收费全文 | 3897篇 |
免费 | 287篇 |
国内免费 | 78篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 217篇 |
妇产科学 | 56篇 |
基础医学 | 401篇 |
口腔科学 | 75篇 |
临床医学 | 667篇 |
内科学 | 800篇 |
皮肤病学 | 108篇 |
神经病学 | 166篇 |
特种医学 | 472篇 |
外科学 | 413篇 |
综合类 | 101篇 |
预防医学 | 221篇 |
眼科学 | 52篇 |
药学 | 243篇 |
2篇 | |
肿瘤学 | 256篇 |
出版年
2023年 | 23篇 |
2021年 | 65篇 |
2020年 | 41篇 |
2019年 | 54篇 |
2018年 | 75篇 |
2017年 | 56篇 |
2016年 | 54篇 |
2015年 | 75篇 |
2014年 | 107篇 |
2013年 | 133篇 |
2012年 | 147篇 |
2011年 | 132篇 |
2010年 | 171篇 |
2009年 | 159篇 |
2008年 | 149篇 |
2007年 | 196篇 |
2006年 | 127篇 |
2005年 | 155篇 |
2004年 | 117篇 |
2003年 | 112篇 |
2002年 | 93篇 |
2001年 | 92篇 |
2000年 | 79篇 |
1999年 | 83篇 |
1998年 | 147篇 |
1997年 | 174篇 |
1996年 | 148篇 |
1995年 | 128篇 |
1994年 | 133篇 |
1993年 | 109篇 |
1992年 | 65篇 |
1991年 | 72篇 |
1990年 | 59篇 |
1989年 | 81篇 |
1988年 | 66篇 |
1987年 | 60篇 |
1986年 | 60篇 |
1985年 | 61篇 |
1984年 | 35篇 |
1983年 | 32篇 |
1982年 | 32篇 |
1981年 | 38篇 |
1980年 | 32篇 |
1979年 | 16篇 |
1978年 | 25篇 |
1977年 | 32篇 |
1976年 | 36篇 |
1975年 | 20篇 |
1974年 | 16篇 |
1966年 | 13篇 |
排序方式: 共有4262条查询结果,搜索用时 31 毫秒
1.
Bernard Natukunda Grace Ndeezi Lay See Er Francis Bajunirwe Gayle Teramura Meghan Delaney 《ISBT科学丛刊》2019,14(4):366-373
2.
JM Martín† L Calduch† C Monteagudo‡ I Molina† D Ramón† V Alonso† E Jordᆠ《Journal of the European Academy of Dermatology and Venereology》2006,20(4):428-431
Cutaneous plasmacytosis is a rare disorder characterized by a benign proliferation of mature plasma cells that appears as multiple dark-brown to purplish skin lesions, often associated with polyclonal hypergammaglobulinaemia. We present the case of a 55-year-old Caucasian man who suffered from a cutaneous plasmacytosis associated with two different carcinomas. Cutaneous plasmacytosis seems to be a reactive process because most cases reported are not associated with any apparent underlying disease. Nevertheless, because few reported cases were associated with malignancies, screening of additional neoplasms would be justified. 相似文献
3.
4.
5.
Velma Dobson Meigan B Baldwin Kathleen M Mohan Suzanne M Delaney Erin M Harvey 《Optometry and vision science》2003,80(10):698-702
PURPOSE: To compare measured visual field extent for a 6 degrees stimulus (typical size used in studies of infants) with a 1.5 degrees stimulus (similar to the largest size used in Goldmann perimetry) in young infants. METHODS: A total of 120 infants (60 each at 3.5 months and 7 months of age) and 24 adults were tested monocularly with a kinetic perimetry procedure using a black double-arc perimeter. Each subject was tested with either a 6 degrees or 1.5 degrees white sphere, which was mounted on a black wand and moved smoothly toward the intersection of the perimeter arms at 3.4 degrees /s. Visual field extent along each perimeter arm was defined as the median of 2 to 3 measurements of the position of the leading edge of the stimulus when the subject made an eye movement toward the stimulus. RESULTS: The 6 degrees stimulus produced larger measured visual field extent than the 1.5 degrees stimulus in 3.5-month olds (temporal field only) and in 7-month olds (nasal and temporal field), but not in adults. CONCLUSIONS: Using the testing conditions of the present study, increasing stimulus size beyond the largest used in a Goldmann perimeter (approximately 2 degrees) increases measured visual field extent in young infants, but not in adults. This may relate to differences in peripheral summation areas or to differences in attentional factors between infants and adults. 相似文献
6.
Kathleen R. Delaney RN NP DNSc 《Journal of child and adolescent psychiatric nursing》2006,19(4):194-202
Milieu relationships provide the critical background presence to staff's attempts to motivate, regulate, and teach patients how to cope with stress. Forging a connection with hospitalized children and adolescents demands attention to how they respond to adults and engage with staff around milieu expectations. Assessment guides that deal with these issues are presented. Important aspects of children's relatedness are presented in the context of their working models of adults and the influence of these representations on their response to staff. Coping skills are explained with particular emphasis on behavioral coping strategies. Tied to the assessment process are interventions that emphasize staff's role in helping patients manage strong affects and avoid the use of nonproductive behavior regulation strategies. 相似文献
7.
8.
JM Vilanova J Figueras-Aloy J Roselló G Gómez E Gelpí R Jiménez 《Acta paediatrica (Oslo, Norway : 1992)》1998,87(5):588-592
The aim of this study was to evaluate the cerebral synthesis of eicosanoids in the asphyctic newborn and to investigate the relation between the prostanoid profiles in cerebrospinal fluid (CSF) and the appearance and severity of hypoxic-ischaemic encephalopathy (HIE). Levels of 6-keto-PGF 1-α, TXB2 , PGE2 and PGF2-α in CSF were measured in 40 full term newborns during the first day of life. Thirty of these newborns had birth asphyxia and were divided into three groups: 10 without HIE, 12 with mild HIE and 8 with moderate-severe HIE. They were compared to a control group of 10 non-hypoxic newborns. Determinations of the metabolites in CSF were performed by RIA and expressed as pg/ml (mean ± SD). The CSF TXB2 (thromboxane A2 metabolite) in asphyxiated newborns was always higher than in the control group (28.12 ± 10.6), and related to the severity of HIE ( p = 0:005): without HIE (50.84 ± 16.4; p = 0:02), mild HIE (80.65 ± 12.64; p ± 0:01) and moderate-severe HIE (178.14 ± 20.5; p < 0:01). The CSF 6-keto-PGF 1-α (prostacyclin metabolite) in asphyxiated newborns was always higher than in the control group (80.55 ± 12.56), but indirectly related to the severity of HIE: without HIE (240.95 ± 28.12; p < 0:01), mild HIE (183.65 ± 30.1; p < 0:01) and moderate-severe HIE (140.55 ± 25.12; p < 0:01). In the moderate-severe HIE group, the increase in TXB2 was higher than the rise in 6-keto-PGF 1-α . 相似文献
9.
10.
Occurrence of the t(2;5)(p23;q35) in non-Hodgkin's lymphoma 总被引:9,自引:3,他引:6
Weisenburger DD; Gordon BG; Vose JM; Bast MA; Chan WC; Greiner TC; Anderson JR; Sanger WG 《Blood》1996,87(9):3860-3868
Primary CD30(Ki-1)-positive anaplastic large-cell lymphoma (ALCL) is considered by some to be a distinct clinicopathologic entity associated with the t(2;5) (p23;q35). However, the specificity of t(2;5) for ALCL has not been carefully studied. Therefore, we performed a detailed analysis of all cases of ALCL with abnormal cytogenetics results in the Nebraska Lymphoma Study Group registry, as well as all other cases of non-Hodgkin's lymphoma with t(2;5) in the registry. We found the t(2;5) in only five of 10 cases of ALCL, four of whom were young patients. However, we also found the t(2;5) in 11 other cases of nonanaplastic lymphoma, including eight children with typical peripheral T-cell lymphomas of various types. The t(2;5) was also found in three older adults with B-cell lymphomas of various types. Thus, the t(2;5) was not specific for CD30+ ALCL. However, t(2;5) may define a clinicopathologic entity in children and young adults characterized by variable morphologies with a T-cell or indeterminate phenotype, CD30-positivity, nodal disease with frequent extranodal involvement, advanced stage, and an excellent response to therapy, including bone marrow transplantation for relapsed disease. The clinical relevance of the t(2;5) in older patients requires further study. 相似文献