全文获取类型
收费全文 | 14908篇 |
免费 | 1134篇 |
国内免费 | 115篇 |
专业分类
耳鼻咽喉 | 8篇 |
儿科学 | 1005篇 |
妇产科学 | 53篇 |
基础医学 | 2380篇 |
口腔科学 | 195篇 |
临床医学 | 509篇 |
内科学 | 1262篇 |
皮肤病学 | 140篇 |
神经病学 | 677篇 |
特种医学 | 90篇 |
外科学 | 303篇 |
综合类 | 658篇 |
一般理论 | 1篇 |
预防医学 | 6860篇 |
眼科学 | 16篇 |
药学 | 1493篇 |
4篇 | |
中国医学 | 273篇 |
肿瘤学 | 230篇 |
出版年
2023年 | 233篇 |
2022年 | 977篇 |
2021年 | 1213篇 |
2020年 | 633篇 |
2019年 | 600篇 |
2018年 | 555篇 |
2017年 | 503篇 |
2016年 | 494篇 |
2015年 | 609篇 |
2014年 | 792篇 |
2013年 | 1275篇 |
2012年 | 642篇 |
2011年 | 798篇 |
2010年 | 558篇 |
2009年 | 550篇 |
2008年 | 580篇 |
2007年 | 550篇 |
2006年 | 422篇 |
2005年 | 387篇 |
2004年 | 369篇 |
2003年 | 319篇 |
2002年 | 265篇 |
2001年 | 224篇 |
2000年 | 185篇 |
1999年 | 163篇 |
1998年 | 165篇 |
1997年 | 139篇 |
1996年 | 130篇 |
1995年 | 132篇 |
1994年 | 110篇 |
1993年 | 83篇 |
1992年 | 116篇 |
1991年 | 90篇 |
1990年 | 90篇 |
1989年 | 75篇 |
1988年 | 94篇 |
1987年 | 62篇 |
1986年 | 52篇 |
1985年 | 112篇 |
1984年 | 110篇 |
1983年 | 86篇 |
1982年 | 95篇 |
1981年 | 69篇 |
1980年 | 82篇 |
1979年 | 72篇 |
1978年 | 62篇 |
1977年 | 44篇 |
1976年 | 52篇 |
1975年 | 41篇 |
1974年 | 28篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
6.
《Health & place》2019
The objective of this paper was to assess the link between premature mortality and a combination of neighbourhood contextual (environmental and health) and compositional (socioeconomic and demographic) characteristics. We statistically and spatially examined six environmental variables (ultrafine particles, carcinogenic and non-carcinogenic pollutants, pollution released to air, tree cover, and walkability index), six health service indicators (number health providers, breast, colorectal and cervical cancer screening uptake rates, student nutrition program uptake rates, and healthy food index), and eight socioeconomic indicators (total income, Gini coefficient, two age categories – below and above 40 years, proportion of females to males, visible minorities, Indigenous peoples, education, less than grade 9) among 140 neighbourhoods of the City of Toronto in Ontario (Canada). We applied principal component analysis to identify patterns and to reduce the number of explanatory variables into combined component axes that represent unique variation in these confounded and overlapping factors. We then applied regression analysis to model the relationship between the indices of enviro-health and socioeconomics and their potential relationship with premature mortality. Residual spatial analysis was used to investigate any remaining spatial structure (such as neighbourhoods with higher residual premature mortality rates). Neighbourhood Equity Index was correlated with our enviro-health and socioeconomic indices. Premature mortality within neighbourhoods was predicted by poor cancer screenings, pollution, lack of tree canopy, increased uptake of student nutrition programs and high walkability index. A negative association between premature mortality and pollution was associated low walkability index and presence of visible minorities within neighbourhoods. There was some unexplained residual spatial variation in our model of premature mortality - especially along the shores of Lake Ontario and in neighbourhoods with major highways or road corridors: premature mortality in Toronto neighbourhoods was higher than expected along highway-corridor neighbourhoods and shorelines. Our analysis revealed a significant relationship between neighbourhood contextual features – both environmental and health – and premature mortality, suggesting that these contextual components of neighbourhoods can predict rates of urban premature mortality in Toronto. 相似文献
7.
《Nutrition Clinique et Métabolisme》2016,30(2):158-162
IntroductionFor many years, nutrition of the elderly is of a special attention. The food policies wants to value the regional initiatives that can be slowed down, and new techniques of adapted food are in development. Following a tracking of malnutrition in an establishment for dependent elderly, a program of nutritional improvement was set up. It was decided to transform the dishes of the daily menu into small enriched, mixed, prehensile mouthfuls, with for objective to use the remaining capacities of the patients, to adapt the care to their rhythm, to answer their expectations and their nutritional needs.MethodThe agents of texture of the mouthfuls were adapted. Their enrichment and their presentation were specified, as well as the modalities of distribution, in order to allow an easy access as well by the patients, the nursing and the families. Cooled cupboards were used.ResultsThe residents found again the pleasure to eat by themselves, their self-respect and consequently covered better their needs. A decrease of the malnutrition prevalence was observed. Times of exchange with other establishments and a formation were set up to share this tool. Levers were identified to develop this concept under good conditions.ConclusionThe adapted enriched mouthfuls tool seems to be useful. Its application is inseparable of a voluntary multidisciplinary approach, anchored in the knowledge of the accompanied person and in the analysis of her global situation. This tool is adaptable not only in any structure welcoming dependent, old people or not, but also at home. 相似文献
8.
9.
Is it possible to make a diagnosis of raw,heated, and baked egg allergy in children using cutoffs? A systematic review 下载免费PDF全文
10.
Takaharu Negoro Kanami Orihara Tomoko Irahara Hiroshi Nishiyama Kanae Hagiwara Risa Nishida Hiroki Takagi Kazue Satoh Yoshiki Yamamoto Shunichi Shimizu Tamio Hagiwara Masakazu Ishii Toshihiro Tanioka Yasuko Nakano Ken Takeda Isao Yoshimura Yoji Iikura Takashi Tobe 《Pediatric allergy and immunology》2006,17(8):583-590
Although many single nucleotide polymorphism (SNP) studies have reported an association of atopy, allergic diseases and total serum immunoglobulin E (IgE) levels, almost all of these studies sought risk factors for the onset of these allergic diseases. Furthermore, many studies have analyzed a single gene and hardly any have analyzed environmental factors. In these analyses, the results could be masked and the effects of other genes and environmental factors may be decreased. Here, we described the correlation between four genes [interleukin (IL)-4 (C-590T), IL-4 receptor (A1652G), FCER1B (G6842A) and STAT6 (G2964A)] in connection with IgE production; the role of IL-10 (C-627A) as a regulatory cytokine of allergy; and the severity of food allergy (FA) and atopic eczema (AE) in 220 Japanese allergic children. In addition to these SNPs, environmental factors, i.e., patient's attitude, indoor environment, and so on, were also investigated in this study. Our study was retrospective, and the correlation was analyzed by our defined clinical scores divided into three terms: worst symptoms, recent symptoms and general amelioration at the most recent examination during the disease course. Our results indicated that IL-10 AA, the genotype with lower IL-10 production, is associated with higher IgE levels in the serum (p < 0.0001, estimate; 0.912). Marginal liver abnormalities were observed in the subject group with both FA and AE (p < 0.1191, estimate; 0.1490). Our defined clinical scores enabled evaluation of various aspects of disease severity. Based on the scores, while no single SNP selected in this study determined severity, the combination of the SNP with laboratory data and environmental factors appeared to determine severity. 相似文献