全文获取类型
| 收费全文 | 28924篇 |
| 免费 | 2531篇 |
| 国内免费 | 34篇 |
专业分类
| 耳鼻咽喉 | 311篇 |
| 儿科学 | 785篇 |
| 妇产科学 | 723篇 |
| 基础医学 | 3467篇 |
| 口腔科学 | 464篇 |
| 临床医学 | 3050篇 |
| 内科学 | 5872篇 |
| 皮肤病学 | 455篇 |
| 神经病学 | 2773篇 |
| 特种医学 | 906篇 |
| 外国民族医学 | 3篇 |
| 外科学 | 4180篇 |
| 综合类 | 547篇 |
| 一般理论 | 57篇 |
| 预防医学 | 3174篇 |
| 眼科学 | 467篇 |
| 药学 | 2033篇 |
| 中国医学 | 34篇 |
| 肿瘤学 | 2188篇 |
出版年
| 2023年 | 166篇 |
| 2022年 | 259篇 |
| 2021年 | 638篇 |
| 2020年 | 352篇 |
| 2019年 | 622篇 |
| 2018年 | 733篇 |
| 2017年 | 532篇 |
| 2016年 | 511篇 |
| 2015年 | 635篇 |
| 2014年 | 856篇 |
| 2013年 | 1274篇 |
| 2012年 | 1743篇 |
| 2011年 | 1734篇 |
| 2010年 | 995篇 |
| 2009年 | 907篇 |
| 2008年 | 1525篇 |
| 2007年 | 1606篇 |
| 2006年 | 1556篇 |
| 2005年 | 1525篇 |
| 2004年 | 1333篇 |
| 2003年 | 1191篇 |
| 2002年 | 1109篇 |
| 2001年 | 628篇 |
| 2000年 | 645篇 |
| 1999年 | 585篇 |
| 1998年 | 321篇 |
| 1997年 | 227篇 |
| 1996年 | 238篇 |
| 1995年 | 247篇 |
| 1994年 | 189篇 |
| 1993年 | 187篇 |
| 1992年 | 438篇 |
| 1991年 | 416篇 |
| 1990年 | 365篇 |
| 1989年 | 373篇 |
| 1988年 | 336篇 |
| 1987年 | 322篇 |
| 1986年 | 292篇 |
| 1985年 | 309篇 |
| 1984年 | 265篇 |
| 1983年 | 220篇 |
| 1982年 | 173篇 |
| 1981年 | 147篇 |
| 1979年 | 240篇 |
| 1978年 | 176篇 |
| 1974年 | 150篇 |
| 1973年 | 191篇 |
| 1972年 | 186篇 |
| 1971年 | 158篇 |
| 1969年 | 147篇 |
排序方式： 共有10000条查询结果，搜索用时 31 毫秒
1.
Boffa Joseph W. Tock Jamie L. Morabito Danielle M. Schmidt Norman B. 《Cognitive therapy and research》2022,46(5):1016-1029
Cognitive Therapy and Research - Despite interest in psychological inflexibility as a marker of suicide risk, no measure of psychological inflexibility specific to SI exists. The present study... 相似文献
2.
3.
Jamie C. Capuzza 《Journal of Children and Media》2020,14(3):324-342
ABSTRACT This project examined 55 picture books featuring transgender, gender expansive or genderqueer protagonists or narrators published between 2008 and 2018. The purpose of the study was to determine how this genre of children’s literature supports and challenges four gender assumptions: the gender binary, gender essentialism, sex/gender congruency and gender stability. Additionally, this critical analysis explored misgendering within this genre and themes of social rejection and acceptance. Protagonists and narrators were permitted a degree of gender nonconformity, however, the majority of picture books missed opportunities for a more complete exploration of gender possibilities. 相似文献
4.
Michelle Moffa Ryan Cronk Donald Fejfar Sarah Dancausse Leslie Acosta Padilla Jamie Bartram 《International journal of hygiene and environmental health》2019,222(3):335-346
Background
There are well-established relationships between health and homelessness, and shelters can facilitate the transmission of diseases and contribute to their prevention. Adequate environmental health conditions and hygiene behaviors in homeless shelters are fundamental to the health of their clients, a marginalized population. We report the status of environmental health conditions and hygiene behaviors in homeless shelters and associated health outcomes; interventions to improve these conditions, behaviors, and outcomes; and obstacles to improvement.Methods
PubMed, Web of Science, Scopus, and EBSCOhost were searched for peer-reviewed studies, and additional sources for grey literature. Studies were included if they reported primary data on one or more environmental health condition or hygiene behavior in homeless shelters.Results
Twenty-eight studies were included in the review. Insufficient ventilation systems, unhygienic bedding, and overcrowding were the most documented environmental health and hygiene deficiencies in homeless shelters, and tuberculosis infections and skin diseases were the most documented associated health outcomes among clients. Studies frequently recommended or described implementation of behavioral and administrative controls, ventilation system improvements, and ultraviolet germicidal irradiation fixtures.Discussion
Most studies addressed airborne transmission of tuberculosis and were conducted in high-income countries, revealing an imbalance in the literature. Insufficient resources and the transience of clients are barriers to improving hygiene behaviors and environmental conditions in homeless shelters. Further investment and research into ensuring adequate hygiene and environmental health in this setting can protect and promote the health and well-being of people experiencing homelessness. 相似文献5.
Whitney S. Brandt Wanpu Yan Jian Zhou Kay See Tan Joseph Montecalvo Bernard J. Park Prasad S. Adusumilli James Huang Matthew J. Bott Valerie W. Rusch Daniela Molena William D. Travis Mark G. Kris Jamie E. Chaft David R. Jones 《The Journal of thoracic and cardiovascular surgery》2019,157(2):743-753.e3
Objective
Comparative survival between neoadjuvant chemotherapy and adjuvant chemotherapy for patients with cT2-4N0-1M0 non–small cell lung cancer has not been extensively studied.Methods
Patients with cT2-4N0-1M0 non–small cell lung cancer who received platinum-based chemotherapy were retrospectively identified. Exclusion criteria included stage IV disease, induction radiotherapy, and targeted therapy. The primary end point was disease-free survival. Secondary end points were overall survival, chemotherapy tolerance, and ability of Response Evaluation Criteria In Solid Tumors response to predict survival. Survival was estimated using the Kaplan–Meier method, compared using the log-rank test and Cox proportional hazards models, and stratified using matched pairs after propensity score matching.Results
In total, 330 patients met the inclusion criteria (n = 92/group after propensity-score matching; median follow-up, 42 months). Five-year disease-free survival was 49% (95% confidence interval, 39-61) for neoadjuvant chemotherapy versus 48% (95% confidence interval, 38-61) for adjuvant chemotherapy (P = .70). On multivariable analysis, disease-free survival was not associated with neoadjuvant chemotherapy or adjuvant chemotherapy (hazard ratio, 1.1; 95% confidence interval, 0.64-1.90; P = .737), nor was overall survival (hazard ratio, 1.21; 95% confidence interval, 0.63-2.30; P = .572). The neoadjuvant chemotherapy group was more likely to receive full doses and cycles of chemotherapy (P = .014/0.005) and had fewer grade 3 or greater toxicities (P = .001). Response Evaluation Criteria In Solid Tumors response to neoadjuvant chemotherapy was associated with disease-free survival (P = .035); 15% of patients receiving neoadjuvant chemotherapy (14/92) had a major pathologic response.Conclusions
Timing of chemotherapy, before or after surgery, is not associated with an improvement in overall or disease-free survival among patients with cT2-4N0-1M0 non–small cell lung cancer who undergo complete surgical resection. 相似文献6.
As millions of people turn to social media for health information, better understanding the factors that guide health-related judgments and perceptions in this context is imperative. We report on two Web experiments (n > 400 total) examining the power of society’s widespread weight bias and related stereotypes to influence nutrition judgments in social media spaces. In Experiment 1, meals were judged as lower in nutritional quality when the person who recommended them (the source) was depicted as obese rather than of normal weight, an effect mediated by stereotypic beliefs about the source as a generally unhealthy person. Experiment 2 replicated this effect, which—notably—remained significant when controlling for objective nutritional information (calories and fat content). Results highlight spillover effects of weight bias that extend beyond person perception to color impressions of objects (here, food) that are associated with stigmatized attributes. Implications for everyday nutrition judgments and public health are considered. 相似文献
7.
8.
9.
10.
Bimal Bhindi Christine M. Lohse Phillip J. Schulte Ross J. Mason John C. Cheville Stephen A. Boorjian Bradley C. Leibovich R. Houston Thompson 《European urology》2019,75(5):766-772