全文获取类型
收费全文 | 3986篇 |
免费 | 202篇 |
国内免费 | 53篇 |
专业分类
耳鼻咽喉 | 45篇 |
儿科学 | 91篇 |
妇产科学 | 75篇 |
基础医学 | 360篇 |
口腔科学 | 117篇 |
临床医学 | 338篇 |
内科学 | 950篇 |
皮肤病学 | 51篇 |
神经病学 | 442篇 |
特种医学 | 245篇 |
外科学 | 904篇 |
综合类 | 3篇 |
预防医学 | 103篇 |
眼科学 | 105篇 |
药学 | 142篇 |
中国医学 | 2篇 |
肿瘤学 | 268篇 |
出版年
2024年 | 6篇 |
2023年 | 40篇 |
2022年 | 109篇 |
2021年 | 194篇 |
2020年 | 106篇 |
2019年 | 123篇 |
2018年 | 153篇 |
2017年 | 99篇 |
2016年 | 132篇 |
2015年 | 149篇 |
2014年 | 190篇 |
2013年 | 247篇 |
2012年 | 310篇 |
2011年 | 317篇 |
2010年 | 185篇 |
2009年 | 178篇 |
2008年 | 205篇 |
2007年 | 215篇 |
2006年 | 202篇 |
2005年 | 157篇 |
2004年 | 171篇 |
2003年 | 142篇 |
2002年 | 156篇 |
2001年 | 42篇 |
2000年 | 31篇 |
1999年 | 39篇 |
1998年 | 31篇 |
1997年 | 25篇 |
1996年 | 14篇 |
1995年 | 17篇 |
1994年 | 11篇 |
1993年 | 15篇 |
1992年 | 24篇 |
1991年 | 21篇 |
1990年 | 15篇 |
1989年 | 11篇 |
1988年 | 12篇 |
1987年 | 13篇 |
1986年 | 17篇 |
1985年 | 20篇 |
1984年 | 12篇 |
1983年 | 12篇 |
1982年 | 10篇 |
1981年 | 9篇 |
1979年 | 4篇 |
1978年 | 4篇 |
1971年 | 4篇 |
1969年 | 9篇 |
1968年 | 5篇 |
1966年 | 5篇 |
排序方式: 共有4241条查询结果,搜索用时 15 毫秒
61.
Michael C. Wimberly Aashis Lamsal Paolla Giacomo Ting-Wu Chuang 《The American journal of tropical medicine and hygiene》2014,91(4):677-684
The national resurgence of human West Nile virus (WNV) disease in 2012 raised questions about the factors responsible for WNV outbreaks. Interannual climatic variations may influence WNV amplification and transmission to humans through multiple pathways, including mosquito breeding habitats, gonotrophic cycles, extrinsic incubation, avian communities, and human behavior. We examined the influences of temperature and precipitation anomalies on interannual variation in human WNV cases in three regions of the United States. There were consistent positive influences of winter temperatures, weaker and more variable positive effects of spring and summer temperatures, and highly variable precipitation effects that ranged from positive to negative. The overwintering period may be a particularly important climatic constraint on the dynamics of WNV in cold-temperate regions of North America. Geographic differences in the seasonal timing and relative importance of climatic drivers of WNV risk likely reflect underlying variability in key ecological and social characteristics. 相似文献
62.
63.
Erika Limoncin Angela D’Alfonso Claudia Corallino Vincenza Cofini Giovanna Di Febbo Giacomo Ciocca 《Journal of psychosomatic obstetrics and gynaecology》2017,38(4):310-316
Introduction: To evaluate the impact of voluntary termination of pregnancy (VTOP) on the psycho-sexological well-being of females before/six months after the abortion.Methods: A sample of 194 women was recruited from three obstetrics and gynaecological divisions. The women were evaluated for the variables “sexual functioning” with the Female Sexual Function Index (FSFI), “depression” with the Beck Depression Inventory (BDI-II), and “anxiety state” with the Self-Rating Anxiety Scale (SAS) at time 0 (the beginning of the abortion procedure) and time 1 (six months after the abortion). Since 24 women refused to fill out the questionnaires, the final sample was composed of 170 women.Results: The women showed a slight although significant improvement in the mean FSFI score from time 0 (16.7?±?12.9) to time 1 (20.9?±?13.8) (p?0.001) which paralleled with a slight decrease in the incidence of clinically significant sexual dysfunction [49% (84/170) (time 0) versus 34.1% (58/170) (time 1)], (McNemar’s test; p?=?0.0241). The sub-group of younger women (18–25) showed a lesser increase in FSFI score from time 0 to time 1. In addition, both depression (p?=?0.048) and anxiety (p?0.001) significantly decreased over time. However, the female sexuality remained impaired since more than two thirds (69.5%) of women were sexually dysfunctional six months after VTOP.Discussion: Voluntary TOP may influence the sexuality of younger females differently from how it influences that of older women. Hence, the sexuality of younger female should be regularly supervised in follow-up examinations. 相似文献
64.
Nicola Crea Giacomo Pata Ernesto Di Betta Amin Titi Francesco Mittempergher 《Obesity surgery》2011,21(2):151-156
Although the appendix has been recognized as a preferential site for carcinoid tumors in obese patients, no definitive guidelines
are so far available regarding the management of these patients when candidates for bariatric surgery. This study was designed
to fill that gap. Between 2000-2008, 558 patients underwent bariatric procedures. Appendectomy was routinely performed in
477 cases. Their charts were retrospectively retrieved and histopathology responses on surgical specimens were recorded. We
aimed to assess: incidence of appendix carcinoid tumors (ACTs) and any possible risk-factor; modality of diagnosis (pre-,
intra- or post-operatively); impact on the planned bariatric procedure; treatment reserved to such cases. Typical ACTs were
diagnosed in 7 patients (1.4%) (median age: 33 years; median BMI: 49 kg/m2; males/females: 1/6). Four were diagnosed intra-operatively.
Because of dimensions (<2 cm) and absence of mesoappendiceal or serosal involvement, simple appendectomy was performed during
bariatric procedure, as planned. Three were diagnosed post-operatively (all <2 cm). In 1 case right hemicolectomy was performed
1 month later due to mesoappendiceal involvement. No appendectomy-related complication was encountered. All patients remained
tumor-free during follow-up (mean: 64 months; range, 25-92). Young age, female sex, high BMI and diabetes mellitus resulted
significantly associated with ACT. Our study sustains routine appendectomy or at least careful investigation of the appendix
during bariatric surgery. For tumors <2 cm without mesoappendiceal or serosal involvement, simple appendectomy proved sufficient.
Bariatric surgery did not have a negative effect on the treatment of malignancies that are discovered intra- or post-operatively. 相似文献
65.
66.
67.
Primary cardiac T-cell lymphoma 总被引:1,自引:0,他引:1
Giunta R Cravero RG Granata G Sellitto A Romano C De Fanis U Foccillo G De Capite C Santini M Rossiello L Rossiello R Lucivero G 《Annals of hematology》2004,83(7):450-454
Primary cardiac lymphoma (PCL), defined as a lymphoma clinically mimicking cardiac disease, with the bulk of the tumor located intrapericardially, is extremely rare in immunocompetent patients. Clinical manifestations vary depending on sites of involvement in the heart and include chest pain, arrhythmias, pericardial effusion, and heart failure. Diagnosis is often difficult and may require invasive procedures; in some cases, diagnosis is not made until autopsy. Histologically, nearly all cases of PCL reported thus far have been of B-cell origin. In this report, we describe a case of PCL of T-cell origin in an adult immunocompetent patient, the second reported in the literature to the best of our knowledge, and provide a brief overview of the features of previously published PCL cases. 相似文献
68.
69.
Ghyslaine Bruna Djeunang Dongho Karthigayan Gunalan Mariangela LEpiscopia Giacomo Maria Paganotti Michela Menegon Rose Efeutmecheh Sangong Georges Bouting Mayaka Joseph Fondop Carlo Severini Martin Sanou Sobze Louis H. Miller Gianluca Russo 《The American journal of tropical medicine and hygiene》2021,104(3):987
70.