全文获取类型
收费全文 | 86380篇 |
免费 | 4041篇 |
国内免费 | 346篇 |
专业分类
耳鼻咽喉 | 2343篇 |
儿科学 | 2791篇 |
妇产科学 | 2674篇 |
基础医学 | 11082篇 |
口腔科学 | 2530篇 |
临床医学 | 5653篇 |
内科学 | 20568篇 |
皮肤病学 | 2554篇 |
神经病学 | 7419篇 |
特种医学 | 1755篇 |
外国民族医学 | 1篇 |
外科学 | 9523篇 |
综合类 | 504篇 |
一般理论 | 23篇 |
预防医学 | 8336篇 |
眼科学 | 1805篇 |
药学 | 7138篇 |
中国医学 | 501篇 |
肿瘤学 | 3567篇 |
出版年
2023年 | 612篇 |
2022年 | 1526篇 |
2021年 | 2976篇 |
2020年 | 1427篇 |
2019年 | 2616篇 |
2018年 | 3272篇 |
2017年 | 2005篇 |
2016年 | 1983篇 |
2015年 | 2097篇 |
2014年 | 3233篇 |
2013年 | 4515篇 |
2012年 | 6107篇 |
2011年 | 6687篇 |
2010年 | 3697篇 |
2009年 | 2855篇 |
2008年 | 4639篇 |
2007年 | 5112篇 |
2006年 | 4880篇 |
2005年 | 4864篇 |
2004年 | 4560篇 |
2003年 | 4273篇 |
2002年 | 3777篇 |
2001年 | 2019篇 |
2000年 | 2188篇 |
1999年 | 1707篇 |
1998年 | 553篇 |
1997年 | 435篇 |
1996年 | 323篇 |
1995年 | 302篇 |
1994年 | 251篇 |
1993年 | 193篇 |
1992年 | 542篇 |
1991年 | 443篇 |
1990年 | 441篇 |
1989年 | 317篇 |
1988年 | 326篇 |
1987年 | 297篇 |
1986年 | 265篇 |
1985年 | 255篇 |
1984年 | 163篇 |
1983年 | 162篇 |
1982年 | 135篇 |
1981年 | 156篇 |
1980年 | 114篇 |
1979年 | 161篇 |
1978年 | 130篇 |
1974年 | 114篇 |
1971年 | 91篇 |
1969年 | 89篇 |
1968年 | 81篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Megan L. Robbins Robert C. Wright Ana María López Karen Weihs 《Journal of psychosocial oncology》2019,37(2):160-177
AbstractObjectives: This study examined word use as an indicator of interpersonal positive reframing in daily conversations of couples coping with breast cancer and as a predictor of stress.Design: The Electronically Activated Recorder (EAR) and Linguistic Inquiry and Word Count (LIWC) were used to examine naturally occurring word use conceptually linked to positive reframing (positive emotion, negative emotion, and cognitive processing words).Sample: Fifty-two couples coping with breast cancer.Methods: Couples wore the EAR, a device participants wear, that audio-recorded over one weekend (>16,000 sound files), and completed self-reports of positive reframing (COPE) and stress (Perceived Stress Scale). LIWC, a software program, measured word use.Findings: Both partners’ word use (i.e., positive emotion and cognitive processing words) was associated with their own reported positive reframing, and spouses’ word use was also indicative of patients’ positive reframing. Results also revealed that, in general, words indicating positive reframing predicted lower levels of stress.Conclusions: Findings supported the hypothesis that partners—and particularly spouses of breast cancer patients—may assist each other’s coping by positively reframing the cancer experience and other negative experiences in conversation. 相似文献
2.
3.
4.
María Cabrerizo Gloria Trallero María José Pena Amaia Cilla Gregoria Megias Carmen Mu?oz-Almagro Eva Del Amo Diana Roda Ana Isabel Mensalvas Antonio Moreno-Docón Juan García-Costa Nuria Rabella Manuel Ome?aca María Pilar Romero Sara Sanbonmatsu-Gámez Mercedes Pérez-Ruiz María José Santos-Mu?oz Cristina Calvo And the study group of “Enterovirus parechovirus infections in children under ?years-old Spain” PI- 《European journal of pediatrics》2015,174(11):1511-1516
5.
6.
J. Rodríguez-Carrio A. Martínez-Zapico I. Cabezas-Rodríguez L. Benavente Á.I. Pérez-Álvarez P. López J.B. Cannata-Andía M. Naves-Díaz A. Suárez 《Nutrition, metabolism, and cardiovascular diseases : NMCD》2019,29(2):135-143
Background and aims
Since accelerated atherosclerosis has been reported in systemic lupus erythematosus (SLE), predictive biomarkers of cardiovascular disease (CVD) are needed. Among non-traditional risk factors, bone mineral density (BMD) has been related to CVD. However, its role in SLE remains controversial. This study aims to analyze the associations of subclinical atherosclerosis with traditional and non-traditional CV risk factors.Methods and results
In a cross-sectional study, atherosclerosis burden was compared between 112 female SLE patients and 31 controls. Plaque number and carotid intima-media wall thickness (cIMT) were assessed by ultrasonography. In a retrospective study, BMD determinations obtained 5-years before the ultrasonography assessment were analyzed in a subgroup of 62 patients. Plaque frequency was increased in SLE, even in patients without CV events or carotid wall thickening. cIMT was increased in patients with CVD, positively correlated with body mass index (BMI). Interestingly, a paradoxical effect of BMI on carotid parameters was observed. Whereas underweight patients (BMI < 20) showed increased prevalence of carotid plaques with low cIMT, those with BMI > 30 showed higher cIMT and plaque burden. Overweight patients (25 < BMI<30) exhibited both elevated cIMT and plaque number. BMI was an independent predictor of BMD. In our retrospective study, patients with either clinical or subclinical CVD exhibited lower BMD levels than their CV-free counterparts. A low lumbar spine BMD independently predicted CVD development after adjusting for confounders.Conclusion
SLE was associated with a higher subclinical atherosclerosis burden, a bimodal effect being observed for BMI. Decreased BMD can be a CV risk biomarker in SLE. 相似文献7.
Dalia Magaña 《Health communication》2020,35(5):649-657
ABSTRACTThis study closely examines 51 breast cancer narratives Latina and Spanish women wrote for other patients to illuminate how they conceptualize their health, with insights for addressing health disparities. Using discourse analysis of the role of language and culture in health care communication, this study focuses on the use of metaphors in the narratives. This provides revelations about the cultural and linguistic aspects of how the writers conceptualize their disease. Building on past research on metaphor use in cancer discourse in the English language, this study reveals the prevalence of metaphors comparing cancer to combat, or more generally, violence (e.g., “my battle against cancer”), or a journey (e.g., “my path with cancer”). Writers used this metaphorical language to offer advice to others with cancer and to mark their membership in a larger community of people with cancer. We also find that Spanish women use metaphors more frequently than Latinas and that they differed in their metaphorical portrayals of cancer. This research uncovers culturally embedded themes that are central to how women with cancer think about the disease, such as the prominence of spirituality in Latinas’ metaphorical constructions, a pattern not evident in Spanish women’s narratives. 相似文献
8.
9.
10.
Marcondes C Fran?a Maria E Calcagnotto Jaderson C da Costa Iscia Lopes-Cendes 《Movement disorders》2006,21(7):1051-1053
Spinocerebellar ataxia (SCA) types 2 and 3 are autosomal-dominant neurodegenerative disorders caused by mutations in two different genes. We identified mutations for SCA2 and SCA3 segregating simultaneously in a single Brazilian family. The index patient had SCA2, whereas her two second-degree cousins had SCA3. Disease was more rapidly progressive in the SCA2 patient, who presented severe brainstem and pancerebellar atrophy, as opposed to the two SCA3 patients, who had only mild cerebellar vermian atrophy. In such situations, molecular confirmation of all patients may avoid misdiagnosis of SCA subtypes and eventual errors in predictive testing of unaffected family members. 相似文献