全文获取类型
收费全文 | 5004篇 |
免费 | 345篇 |
国内免费 | 29篇 |
专业分类
耳鼻咽喉 | 76篇 |
儿科学 | 155篇 |
妇产科学 | 106篇 |
基础医学 | 708篇 |
口腔科学 | 122篇 |
临床医学 | 456篇 |
内科学 | 1065篇 |
皮肤病学 | 341篇 |
神经病学 | 407篇 |
特种医学 | 127篇 |
外科学 | 445篇 |
综合类 | 26篇 |
一般理论 | 2篇 |
预防医学 | 546篇 |
眼科学 | 117篇 |
药学 | 373篇 |
中国医学 | 13篇 |
肿瘤学 | 293篇 |
出版年
2023年 | 54篇 |
2022年 | 69篇 |
2021年 | 143篇 |
2020年 | 93篇 |
2019年 | 111篇 |
2018年 | 159篇 |
2017年 | 104篇 |
2016年 | 141篇 |
2015年 | 136篇 |
2014年 | 199篇 |
2013年 | 239篇 |
2012年 | 359篇 |
2011年 | 394篇 |
2010年 | 227篇 |
2009年 | 179篇 |
2008年 | 334篇 |
2007年 | 322篇 |
2006年 | 331篇 |
2005年 | 304篇 |
2004年 | 279篇 |
2003年 | 251篇 |
2002年 | 238篇 |
2001年 | 84篇 |
2000年 | 80篇 |
1999年 | 77篇 |
1998年 | 38篇 |
1997年 | 41篇 |
1996年 | 24篇 |
1995年 | 39篇 |
1994年 | 18篇 |
1993年 | 20篇 |
1992年 | 33篇 |
1991年 | 23篇 |
1990年 | 20篇 |
1989年 | 24篇 |
1988年 | 23篇 |
1987年 | 13篇 |
1986年 | 11篇 |
1985年 | 16篇 |
1984年 | 13篇 |
1983年 | 12篇 |
1982年 | 9篇 |
1981年 | 10篇 |
1980年 | 8篇 |
1979年 | 13篇 |
1978年 | 8篇 |
1975年 | 7篇 |
1974年 | 6篇 |
1972年 | 7篇 |
1971年 | 6篇 |
排序方式: 共有5378条查询结果,搜索用时 203 毫秒
1.
2.
3.
Poverty and health. Prospective evidence from the Alameda County Study 总被引:52,自引:0,他引:52
To examine the reasons for the association between socioeconomic status and poor health, the authors examined the nine-year mortality experience of a random sample of residents aged 35 and over in Oakland, California. Residents of a federally designated poverty area experienced higher age-, race-, and sex-adjusted mortality over the follow-up period compared with residents of nonpoverty areas (relative risk = 1.71, 95 per cent confidence interval 1.20-2.44). This increased risk of death persisted when there was multivariate adjustment for baseline health status, race, income, employment status, access to medical care, health insurance coverage, smoking, alcohol consumption, physical activity, body mass index, sleep patterns, social isolation, marital status, depression, and personal uncertainty. These results support the hypothesis that properties of the sociophysical environment may be important contributors to the association between low socioeconomic status and excess mortality, and that this contribution is independent of individual behaviors. 相似文献
4.
Esparza-Gordillo Jorge; Goicoechea de Jorge Elena; Buil Alfonso; Berges Luis Carreras; Lopez-Trascasa Margarita; Sanchez-Corral Pilar; Rodriguez de Cordoba Santiago 《Human molecular genetics》2005,14(8):1107
Some MCP SNP and aHUS-associated MCP mutation 相似文献
5.
In this study we consider the process of the clinical encounter, and present exemplars of how assumptions of both clinicians and their patients can shift or transform in the course of a diagnostic interview. We examine the process as it is recalled, and further elaborated, in post-diagnostic interviews as part of a collaborative inquiry during reflections with clinicians and patients in the northeastern United States. Rather than treating assumptions by patients and providers as a fixed attribute of an individual, we treat them as occurring between people within a particular social context, the diagnostic interview. We explore the diagnostic interview as a landscape in which assumptions occur (and can shift), navigate the features of this landscape, and suggest that our examination can best be achieved by the systematic comparison of views of the multiple actors in an experience-near manner. We describe what might be gained by this shift in assumptions and how it can make visible what is at stake for clinician and patient in their local moral worlds—for patients, acknowledgment of social suffering, for clinicians how assumptions are a barrier to engagement with minority patients. It is crucial for clinicians to develop this capacity for reflection when navigating the interactions with patients from different cultures, to recognize and transform assumptions, to notice ‘surprises’, and to elicit what really matters to patients in their care. 相似文献
6.
M. I. Manrique-Poyato A. J. Muñoz-Pajares V. Loreto M. D. López-León J. Cabrero J. P. M. Camacho 《Chromosome research》2006,14(6):693-700
We have analysed B chromosome frequency for three consecutive years, B transmission rate at population and individual levels,
clutch size, egg fertility and embryo–adult viability in a natural population of the grasshopper Eyprepocnemis plorans containing two different B chromosome variants, i.e. B2 and B24, the second being derived from the first and having replaced it in nearby populations. From 2002 to 2003 the relative frequency
of both variants changed, although the differences did not reach significance. A mother–offspring analysis showed no significant
effect of any of the two B variants on clutch size, egg fertility or embryo–adult viability, but B24 was more efficiently transmitted than B2 through males from the 2002 season, which explains the observed frequency change. Controlled crosses, at individual level,
showed significant drive through some females for B24 but not for B2, suggesting that this difference in transmission rate might also be important for the substitution process. The analysis
of relative fitness for B2 and B24 carriers for all fitness components, as a whole, showed a significantly better performance of B24-carrying individuals, suggesting that the cumulative effect of these slight differences might contribute to the replacement
of B2 by B24.
Electronic Supplementary Material Supplementary material is available for this article at . 相似文献
7.
8.
9.
10.
A 47-year-old man, was referred for evaluation of asymptomatic splenomegaly in September 1981, and a diagnosis of hairy cell leukemia (HCL) at the initial clinical stage was made. The patient remained asymptomatic until May 1985, when splenectomy was performed because of anemia and splenomegaly. Bone marrow and liver biopsy specimens showed diffuse infiltration by abnormal tartase resistant acid phosphatase (TRAP) positive lymphocytes with typical aspect of hairy cells. Four months later, he developed fever of unknown origin and, at laparotomy, diffuse retroperitoneal lymph node enlargement and metastatic liver nodules were seen. Lymph node and liver biopsy specimens showed diffuse infiltration by abnormal large lymphocytes, which bore monoclonal surface immunoglobulin M and light chain kappa. Only six cases of non-Hodgkin's lymphoma associated with HCL have been published to date. This report describes an additional case of immunoblastic B-cell lymphoma, preceded 4 years earlier by the diagnosis of HCL. 相似文献