全文获取类型
收费全文 | 5549篇 |
免费 | 421篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 33篇 |
儿科学 | 194篇 |
妇产科学 | 193篇 |
基础医学 | 653篇 |
口腔科学 | 46篇 |
临床医学 | 959篇 |
内科学 | 1155篇 |
皮肤病学 | 80篇 |
神经病学 | 457篇 |
特种医学 | 103篇 |
外科学 | 453篇 |
综合类 | 53篇 |
一般理论 | 7篇 |
预防医学 | 705篇 |
眼科学 | 96篇 |
药学 | 405篇 |
中国医学 | 8篇 |
肿瘤学 | 394篇 |
出版年
2024年 | 6篇 |
2023年 | 48篇 |
2022年 | 91篇 |
2021年 | 170篇 |
2020年 | 121篇 |
2019年 | 169篇 |
2018年 | 168篇 |
2017年 | 138篇 |
2016年 | 148篇 |
2015年 | 145篇 |
2014年 | 197篇 |
2013年 | 310篇 |
2012年 | 446篇 |
2011年 | 437篇 |
2010年 | 247篇 |
2009年 | 198篇 |
2008年 | 409篇 |
2007年 | 402篇 |
2006年 | 383篇 |
2005年 | 374篇 |
2004年 | 352篇 |
2003年 | 323篇 |
2002年 | 279篇 |
2001年 | 35篇 |
2000年 | 28篇 |
1999年 | 38篇 |
1998年 | 64篇 |
1997年 | 30篇 |
1996年 | 32篇 |
1995年 | 36篇 |
1994年 | 18篇 |
1993年 | 18篇 |
1992年 | 16篇 |
1991年 | 10篇 |
1990年 | 16篇 |
1989年 | 9篇 |
1988年 | 9篇 |
1987年 | 5篇 |
1986年 | 6篇 |
1985年 | 7篇 |
1984年 | 6篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1981年 | 3篇 |
1980年 | 6篇 |
1978年 | 7篇 |
1973年 | 2篇 |
1970年 | 2篇 |
1969年 | 3篇 |
1966年 | 2篇 |
排序方式: 共有5994条查询结果,搜索用时 15 毫秒
31.
Kiki S. N. Liu Julie Y. Chen Kai-Sing Sun Joyce P. Y. Tsang Patrick Ip Cindy L. K. Lam 《Nutrients》2022,14(14)
To tackle unhealthy eating among adolescents, it is crucial to understand the dietary knowledge, attitudes, and practices (KAP) on which adolescent eating habits are based. This qualitative study identifies the gaps in KAP by exploring what Chinese adolescents know, perceive, and practice regarding healthy eating to better inform targeted interventions for this important health problem. Parent–adolescent dyads were purposively sampled based on, for example, the dietary intake, age, and gender of the adolescent and household income, and each completed a 30 to 60 min interview. Twelve themes were synthesized: knowledge: (1) dietary recommendations, (2) health outcomes of healthy eating, (3) nutrition content in food, and (4) access to healthy meals; attitudes: (5) outcome expectation for healthy eating, (6) food preferences, and (7) self-efficacy regarding adopting healthy eating; and practices: (8) going grocery shopping for healthy food, (9) eating home-prepared meals. (10) eating out in restaurants or consuming takeaway food, (11) fruit and vegetable consumption, and (12) snacking, perceived unhealthy eating to be low risk, made unhealthy choices regarding snacking and eating out, and had insufficient fruit and vegetable intake. Programs should emphasize the positive short-term health outcomes of healthy eating and empower adolescents to acquire food preparation skills to sustain healthy eating habits. 相似文献
32.
33.
34.
Pipingas A Silberstein RB Vitetta L Rooy CV Harris EV Young JM Frampton CM Sali A Nastasi J 《Phytotherapy research : PTR》2008,22(9):1168-1174
Dietary interventions may have the potential to counter age-related cognitive decline. Studies have demonstrated an improvement in age-related cognitive impairment in animals after supplementation with plant extracts containing flavonoids but there are few human studies. This double-blind, controlled study examined the effects on cognitive performance of a 5 week supplementation with Enzogenol Pinus radiata bark extract containing flavonoids, in 42 males aged 50-65 years, with a body mass index >25. Participants were supplemented for 5 weeks either with Enzogenol plus vitamin C, or with vitamin C only. A battery of computerized cognitive tests was administered, and cardiovascular and haematological parameters were assessed prior to and following supplementation. The speed of response for the spatial working memory and immediate recognition tasks improved after supplementation with Enzogenol plus vitamin C, whereas vitamin C alone showed no improvements. A trend in a reduction of systolic blood pressure was observed with Enzogenol plus vitamin C, but not with vitamin C alone. The blood safety parameters were unchanged. The findings suggest a beneficial effect of supplementation with Enzogenol on cognition in older individuals. Larger studies are needed to ascertain its potential as a preventive treatment for age-related cognitive decline. 相似文献
35.
36.
IntroductionMany women experience improved sexual function after hysterectomy. However, a sizeable minority of women report worsened sexual function after the surgery, and concerns about the effect of surgery on sexual function are common among women planning to undergo hysterectomy.AimThe present study examined the role of education about the potential sexual consequences of hysterectomy in predicting self‐reported outcomes and satisfaction with the procedure.MethodsWe conducted a cross‐sectional survey of 204 women who had undergone simple hysterectomy in the preceding 3–12 months. Participants volunteered in response to a Web‐based advertisement.Main Outcome MeasuresParticipants indicated their current sexual function using the Female Sexual Function Index (FSFI), and reported positive and negative sexual outcomes experienced after hysterectomy using a checklist. Participants also completed questionnaire items regarding satisfaction with hysterectomy and education from their physicians about sexual risks and benefits prior to surgery.ResultsCurrent sexual function scores were related to self‐reports of positive and negative sexual outcomes following hysterectomy and overall satisfaction with hysterectomy. Education from a physician about possible adverse sexual outcomes was largely unrelated to self‐reports of having experienced those outcomes. However, education about possible negative sexual outcomes predicted overall satisfaction with hysterectomy when controlling for self‐reports of positive and negative sexual outcomes.ConclusionEducation about potential negative sexual outcomes after surgery may enhance satisfaction with hysterectomy, independent of whether negative sexual outcomes were experienced. Including a discussion of potential sexual changes after surgery may enhance the benefits of presurgical counseling prior to hysterectomy. Bradford A, and Meston C. Sexual outcomes and satisfaction with hysterectomy: Influence of patient education. J Sex Med 2007;4:106–114. 相似文献
37.
38.
39.
40.
Fries MH Holt C Carpenter I Carter CL Daniels J Flanagan J Murphy K Hailey BJ Martin L Hume R Hudson G Cadman M Weatherly R Nunes ME 《Military medicine》2002,167(2):99-103
The Department of Defense Familial Breast/Ovarian Cancer Research Project has offered genetic counseling and testing for BRCA1 and BRCA2 on a research basis to patients meeting specific diagnostic criteria, with risk for BRCA1 and BRCA2 mutations calculated based on the Couch model. In 2.5 years, 250 patients were evaluated and 101 patients met criteria requirements, including 33 who met criteria in more than one category. Ninety patients elected to undergo DNA testing. In this group of 90 patients, 14 mutations (15.5%) and 16 unclassified variants (17.7%) were identified. The most common inclusion criteria were onset of breast/ovarian cancer before age 45 years (n = 32) and onset of breast/ovarian cancer before age 45 years with strong family history (n = 21). However, when number of mutations and unclassified variants found were compared separately across all diagnostic criteria (including those of more than one capacity) using the chi 2 statistic, no significant differences were seen among the categories to suggest that one criterion was more predictive of mutations or variants than another. Couch risk values for patients with mutations showed a mean of 14% and ranged from 3.2 to 43.5% (range for all patients, 1.2-69.7%). These findings emphasize the importance of using multiple diagnostic criteria and suggest that a Couch risk value of > 3% may be useful in selecting patients for testing. The data also underscore the necessity of genetic counseling in the testing process, particularly given the large number of unclassified variants diagnosed and their uncertain status for disease predisposition. 相似文献