全文获取类型
收费全文 | 11320篇 |
免费 | 1263篇 |
国内免费 | 147篇 |
专业分类
耳鼻咽喉 | 76篇 |
儿科学 | 253篇 |
妇产科学 | 183篇 |
基础医学 | 627篇 |
口腔科学 | 568篇 |
临床医学 | 1748篇 |
内科学 | 1431篇 |
皮肤病学 | 179篇 |
神经病学 | 500篇 |
特种医学 | 191篇 |
外科学 | 671篇 |
综合类 | 1328篇 |
现状与发展 | 1篇 |
一般理论 | 1篇 |
预防医学 | 3427篇 |
眼科学 | 221篇 |
药学 | 716篇 |
23篇 | |
中国医学 | 354篇 |
肿瘤学 | 232篇 |
出版年
2024年 | 8篇 |
2023年 | 213篇 |
2022年 | 227篇 |
2021年 | 503篇 |
2020年 | 531篇 |
2019年 | 453篇 |
2018年 | 443篇 |
2017年 | 445篇 |
2016年 | 406篇 |
2015年 | 411篇 |
2014年 | 817篇 |
2013年 | 1005篇 |
2012年 | 794篇 |
2011年 | 800篇 |
2010年 | 647篇 |
2009年 | 630篇 |
2008年 | 628篇 |
2007年 | 634篇 |
2006年 | 536篇 |
2005年 | 429篇 |
2004年 | 296篇 |
2003年 | 257篇 |
2002年 | 208篇 |
2001年 | 187篇 |
2000年 | 139篇 |
1999年 | 100篇 |
1998年 | 110篇 |
1997年 | 119篇 |
1996年 | 93篇 |
1995年 | 68篇 |
1994年 | 93篇 |
1993年 | 76篇 |
1992年 | 65篇 |
1991年 | 58篇 |
1990年 | 40篇 |
1989年 | 32篇 |
1988年 | 46篇 |
1987年 | 31篇 |
1986年 | 22篇 |
1985年 | 28篇 |
1984年 | 14篇 |
1983年 | 9篇 |
1982年 | 16篇 |
1981年 | 14篇 |
1980年 | 8篇 |
1979年 | 9篇 |
1978年 | 12篇 |
1977年 | 6篇 |
1976年 | 6篇 |
1975年 | 3篇 |
排序方式: 共有10000条查询结果,搜索用时 16 毫秒
11.
Despite the existence of endemic mycoses in Latin America and the Caribbean, in addition to a large population of patients at risk for invasive mycoses, the capability of medical centres to perform a proper diagnosis in mycology has not been studied in the region. Moreover, availability of antifungal drugs in the region is unknown. Here, we report the results of a survey involving 129 centres in 24 countries. Only 9% of centres would have the potential to apply for the minimum standards in mycology, as determined by the European Confederation of Medical Mycology. There is an urgent need to improve diagnostic conditions in Latin America and the Caribbean, as well as providing access to safer and more efficacious antifungal drugs. 相似文献
12.
Y. Ermias I.A. Morgan K.M. Curtis M.K. Whiteman L.G. Horton L.B. Zapata 《Contraception》2019,99(5):300-305
ObjectiveIdentify factors associated with healthcare providers' frequency of depot medroxyprogesterone acetate (DMPA) provision to adolescents.Study designWe analyzed data from surveys mailed to a nationally representative sample of public-sector providers and office-based physicians (n=1984). We estimated adjusted odds ratios (aORs) and 95% confidence intervals (CIs) of factors associated with frequent DMPA provision to adolescents in the past year.ResultsAlthough most providers (>95%) considered DMPA safe for adolescents, fewer reported frequent provision (89% of public-sector providers; 64% of office-based physicians). Among public-sector providers, factors associated with lower odds of frequent provision included working in settings without Title X funding (aOR 0.44, 95% CI 0.30–0.64), reporting primary care as their primary clinical focus versus reproductive or adolescent health (aOR 0.42, 95% CI 0.28–0.61), and providing fewer patients with family planning services. Among office-based physicians, factors associated with lower odds of frequent provision included specializing in obstetrics/gynecology (aOR 0.50, 95% CI 0.27–0.91) and family medicine (aOR 0.21, 95% CI 0.09–0.47) versus adolescent medicine, completing training ≥15 versus <5 years ago (aOR 0.27, 95% CI 0.09–0.83), and reporting that 0–24% of patients pay with Medicaid or other government healthcare assistance versus ≥50% (aOR 0.23, 95% CI 0.09–0.61). The reason most commonly reported by providers for infrequent DMPA provision was patient preference for another method.ConclusionsWhile most providers reported frequently providing DMPA to adolescents, training on evidence-based recommendations for contraception, focused on subgroups of providers with lower odds of frequent DMPA provision, may increase adolescents' access to contraception.ImplicationsAlthough >95% of providers considered depot medroxyprogesterone (DMPA) a safe contraceptive for adolescents, only 89% of public-sector providers and 64% of office-based physicians reported frequently providing DMPA to adolescents. Provider training on evidence-based recommendations for contraception counseling and provision may increase adolescents' access to DMPA and all methods of contraception. 相似文献
13.
14.
15.
16.
《Diabetes & Metabolic Syndrome: Clinical Research & Reviews》2019,13(2):1329-1334
BackgroundMetabolic syndrome (MetS) is related to the increased risk of major cardiovascular diseases (CVD). The link between high serum total bilirubin (TBL) is cross-sectionally related to MetS and its components. However, whether serum TBL predicts incidence of MetS and its components remains inconclusive.MethodsThe present study included 893 women aged 70 ± 9 years from a rural village. We examined the relationship between serum TBL and MetS based on the modified criteria of the National Cholesterol Education Program's Adult Treatment Panel (NCEP-ATP) III report in a cross-sectional (N = 893) and cohort (N = 288) data.ResultsIn the cross-sectional study, serum TBL (β = 0.536, p < 0.001) as well as age, alcohol consumption, exercise habits, history of CVD, SUA, GGT, and ALT was significantly and dependently associated with number of MetS components, but in the cohort study serum TBL was not associated with number of MetS components. Compared with the 1st tertile of serum TBL (0.20–0.55 mg/dL), multivariate-adjusted odds ratio (95% confidence interval) for the 2nd -3rd tertiles of serum TBL (0.54–2.00 mg/dL) was 0.70 (0.51–0.95) in the cross-sectional study and 0.41 (0.21–0.81) in the cohort study.ConclusionsOur data demonstrated an independently negative association between serum TBL and MetS in Japanese community-dwelling women. 相似文献
17.
目的 了解江苏地区精神专科医院临床女护士主观幸福感的现状及影响因素,为提高精神专科医院的管理水平提供参考依据。方法 采用中文版的“总体幸福感量表”和自制的“一般情况调查表”对江苏省不同地区的6所精神专科医院1260名女护士进行调查。 结果 被调查对象主观幸福感前18项总分为(67.89±14.09)分,处于中等幸福感49~72分之间,但显著低于全国女性常模(71.00±18.00)分,两者比较,t =-2.768,差异有统计学意义(P<0.01);经回归分析,其主要影响因素有对职业伤害的担心程度、家庭的支持程度、收入状况、医院支持系统的满意度,差异均有统计学意义(P<0.01或P<0.05)。结论 江苏地区的精神科女护士主观幸福感总体处于中等水平但显著低于全国女性常模,提高其主观幸福感可以从减少精神科护士的职业伤害、关注家庭方面影响、建立合理的薪酬体系和高效的医院支持系统4个方面努力。 相似文献
18.
19.
Pedro Lopez Matheus Daros Pinto Ronei Silveira Pinto 《Ultrasound in medicine & biology》2019,45(2):612-616
In the work described here, our aim was to determine, in an elderly population, changes in muscle thickness (MT), cross-sectional area (CSA) and echo intensity (EI) of the quadriceps muscles at four time points (0, 5, 10 and 15 min; i.e., T0, T5, T10 and T15, respectively) after changing from a standing to supine position. Twenty-one elderly participants (14 men: 68.1 ± 4.6 y; 8 women: 66.8 ± 4.1 y) were evaluated at four time points. Rectus femoris CSA (RFCSA), MT and EI of the quadriceps femoris (QF) muscles were assessed. EI significantly increased from T0 to T5, T10 and T15 (p < 0.001), whereas no differences were observed between T5 and T15 in the rectus femoris (RFEI), vastus intermedius (VIEI) and quadriceps femoris (QFEI). No differences were observed between any time points in the RFCSA and MT of QF muscles. In summary, these results suggest that periods >5 min are not necessary to obtain consistent MT and EI measurements of quadriceps femoris muscles in the elderly population. 相似文献
20.
Jenni Jaakkola Anja Rantanen Pauliina Luopa Anna‐Maija Koivisto Katja Joronen 《Scandinavian journal of caring sciences》2019,33(1):144-155
This article examines the self‐rated health, symptoms and health behaviour of upper secondary vocational students in Finland. The data consist of the responses of first‐ and second‐year vocational students (n = 34 554) to the 2013 School Health Promotion Survey. The data were analysed statistically and processed separately for girls and boys. Associations between self‐rated health, symptoms and health behaviour and fields of study were examined by cross‐tabulation. Statistical significance was measured using the chi‐squared test. Self‐rated health, symptoms and health behaviour were found to have a statistically significant association with field of study (p < 0.001). Vocational students in different fields had different experiences of health, different symptoms and different health behaviours. The results complement existing evidence about disparities in well‐being among young people in the context of education. 相似文献