全文获取类型
收费全文 | 5337篇 |
免费 | 405篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 650篇 |
妇产科学 | 153篇 |
基础医学 | 474篇 |
口腔科学 | 15篇 |
临床医学 | 298篇 |
内科学 | 402篇 |
皮肤病学 | 21篇 |
神经病学 | 2085篇 |
特种医学 | 71篇 |
外科学 | 270篇 |
综合类 | 81篇 |
现状与发展 | 1篇 |
一般理论 | 1篇 |
预防医学 | 955篇 |
眼科学 | 8篇 |
药学 | 169篇 |
中国医学 | 3篇 |
肿瘤学 | 82篇 |
出版年
2024年 | 18篇 |
2023年 | 305篇 |
2022年 | 397篇 |
2021年 | 381篇 |
2020年 | 362篇 |
2019年 | 266篇 |
2018年 | 256篇 |
2017年 | 313篇 |
2016年 | 343篇 |
2015年 | 307篇 |
2014年 | 572篇 |
2013年 | 375篇 |
2012年 | 204篇 |
2011年 | 189篇 |
2010年 | 269篇 |
2009年 | 283篇 |
2008年 | 115篇 |
2007年 | 129篇 |
2006年 | 90篇 |
2005年 | 62篇 |
2004年 | 45篇 |
2003年 | 44篇 |
2002年 | 40篇 |
2001年 | 54篇 |
2000年 | 35篇 |
1999年 | 46篇 |
1998年 | 25篇 |
1997年 | 34篇 |
1996年 | 32篇 |
1995年 | 30篇 |
1994年 | 19篇 |
1993年 | 12篇 |
1992年 | 10篇 |
1991年 | 14篇 |
1990年 | 3篇 |
1989年 | 3篇 |
1988年 | 6篇 |
1987年 | 15篇 |
1986年 | 16篇 |
1985年 | 4篇 |
1984年 | 4篇 |
1983年 | 2篇 |
1982年 | 3篇 |
1981年 | 4篇 |
1980年 | 6篇 |
1978年 | 1篇 |
1977年 | 4篇 |
1976年 | 1篇 |
排序方式: 共有5748条查询结果,搜索用时 15 毫秒
91.
《Nursing outlook》2021,69(6):961-968
The purpose of this consensus paper was to convene leaders and scholars from eight Expert Panels of the American Academy of Nursing and provide recommendations to advance nursing's roles and responsibility to ensure universal access to palliative care. Part I of this consensus paper herein provides the rationale and background to support the policy, education, research, and clinical practice recommendations put forward in Part II. On behalf of the Academy, the evidence-based recommendations will guide nurses, policy makers, government representatives, professional associations, and interdisciplinary and community partners to integrate palliative nursing services across health and social care settings. The consensus paper's 43 authors represent eight countries (Australia, Canada, England, Kenya, Lebanon, Liberia, South Africa, United States of America) and extensive international health experience, thus providing a global context for the subject matter. The authors recommend greater investments in palliative nursing education and nurse-led research, nurse engagement in policy making, enhanced intersectoral partnerships with nursing, and an increased profile and visibility of palliative nurses worldwide. By enacting these recommendations, nurses working in all settings can assume leading roles in delivering high-quality palliative care globally, particularly for minoritized, marginalized, and other at-risk populations. 相似文献
92.
BackgroundBorderline personality disorder (BPD) is characterized by greater engagement in non-suicidal self-injury (NSSI) and suicidality. The aim of the study is to test whether the occurrence of child abuse contributes to these high-risk behaviors in BPD youth.Materials and methodsBPD female youth aged 13–21 years with (n = 29) and without (n = 29) a history of child abuse were administered clinical interviews assessing diagnostic history, child abuse, NSSI and suicidality (i.e., ideation, plans, and attempts). NSSI and suicidality were subsequently reevaluated at the 1- and 2-month follow-up assessments.ResultsSeveral findings emerged. First, relative to BPD youth without abuse, the abuse group reported greater past NSSI; however, no significant differences emerged in the follow-up period. Second, the occurrence of child abuse was associated with a 5-fold increase in the rate of lifetime suicide attempts relative to the no abuse group and additionally, prospectively predicted suicide ideation (but not attempts). Last, exploratory analyses indicated that the co-occurrence of physical and sexual abuse was associated with greater past NSSI and suicidality as compared to the no abuse and sexual abuse only participants.ConclusionAs a whole, child abuse – particularly co-occurring physical and sexual abuse – increases risk for NSSI and suicidality among BPD youth, which may have important treatment implications in this high-risk population. 相似文献
93.
94.
95.
《Vaccine》2018,36(26):3779-3788
BackgroundInjection using needle and syringe (N&S) is the most widely used method for vaccination, but requires trained healthcare workers. Fear of needles, risk of needle-stick injury, and the need to reconstitute lyophilised vaccines, are also drawbacks. The Nanopatch (NP) is a microarray skin patch comprised of a high-density array of microprojections dry-coated with vaccine that is being developed to address these shortcomings. Here we report a randomised, partly-blinded, placebo-controlled trial that represents the first use in humans of the NP to deliver a vaccine.MethodsHealthy volunteers were vaccinated once with one of the following: (1) NPs coated with split inactivated influenza virus (A/California/07/2009 [H1N1], 15 µg haemagglutinin (HA) per dose), applied to the volar forearm (NP-HA/FA), n = 15; (2) NPs coated with split inactivated influenza virus (A/California/07/2009 [H1N1], 15 µg HA per dose), applied to the upper arm (NP-HA/UA), n = 15; (3) Fluvax® 2016 containing 15 µg of the same H1N1 HA antigen injected intramuscularly (IM) into the deltoid (IM-HA/D), n = 15; (4) NPs coated with excipients only, applied to the volar forearm (NP-placebo/FA), n = 5; (5) NPs coated with excipients only applied to the upper arm (NP-placebo/UA), n = 5; or (6) Saline injected IM into the deltoid (IM-placebo/D), n = 5. Antibody responses at days 0, 7, and 21 were measured by haemagglutination inhibition (HAI) and microneutralisation (MN) assays.FindingsNP vaccination was safe and acceptable; all adverse events were mild or moderate. Most subjects (55%) receiving patch vaccinations (HA or placebo) preferred the NP compared with their past experience of IM injection with N&S (preferred by 24%). The antigen-vaccinated groups had statistically higher HAI titres at day 7 and 21 compared with baseline (p < 0.0001), with no statistical differences between the treatment groups (p > 0.05), although the group sizes were small. The geometric mean HAI titres at day 21 for the NP-HA/FA, NP-HA/UA and IM-HA/D groups were: 335 (189–593 95% CI), 160 (74–345 95% CI), and 221 (129–380 95% CI) respectively. A similar pattern of responses was seen with the MN assays. Application site reactions were mild or moderate, and more marked with the influenza vaccine NPs than with the placebo or IM injection.InterpretationInfluenza vaccination using the NP appeared to be safe, and acceptable in this first time in humans study, and induced similar immune responses to vaccination by IM injection. 相似文献
96.
《Vaccine》2017,35(33):4119-4125
BackgroundData on characteristics of invasive pneumococcal diseases (IPD) is limited in China. We aimed to understand the clinical features and explore the molecular characteristics of the pneumococcal isolates in China.MethodsSince 2010, we prospectively collected the pneumococcal isolates and the IPD patients’ demographic and clinical information in Suzhou University Affiliated Children’s Hospital (SCH). The antibiotic susceptibility, serotypes, genotypes of Streptococcus pneumoniae strains were identified by E-test, quellung reaction and/or multiplex PCR, and multi-locus sequence typing, respectively.ResultsDuring the period from January 2010 to December 2015, a total of 80 IPD patients were identified. They were diagnosed as meningitis (31.3%), septicemia (27.5%), pneumonia (21.3%) and others (20.0%). About half of them required vancomycin treatment, 42.5% were admitted to ICUs, 36.2% had complications and 6.2% were hospitalized for over 1 year. The most common serotypes of the pneumococcal isolates were serotypes 6B and 14, the coverage of PCV13 was 92.5%, and CC236s and CC199s were the most common clone complexes.ConclusionsPediatric IPD patients had severe clinical symptoms, demanded intensive treatment, suffered poor prognosis and substantial burden. The pneumococcal isolates’ serotype coverage of PCV13 vaccine was high, which leads to implication of PCV vaccine usage among children in China. 相似文献
97.
《Academic pediatrics》2014,14(3):256-261
ObjectiveBaby gates are one of the most widely used home safety products to protect children from home hazards. The objective was to describe the epidemiology of baby gate and barrier-associated injuries among children. It was hypothesized that injuries experienced by children ages ≤2 years and those >2 years were significantly different as a result of differences in gate interactions.MethodsA retrospective analysis was conducted by using nationally representative data from the National Electronic Injury Surveillance System. A total of 1188 actual cases were reviewed and national estimates generated.ResultsAn estimated 37,673 children were treated in emergency departments for injuries associated with gates, yielding an average of 1794 cases annually. The incidence of gate-related injuries increased significantly from 3.9 per 100,000 children in 1990 to 12.5 per 100,000 children in 2010 (P < .001). Patients were primarily boys (61.0%) and were <2 years of age (60.4%). Patients <2 years of age were most often injured by falls down stairs (odds ratio 6.72; 95% confidence interval 6.32–7.16) after the collapse of the gate. Patients aged 2 to 6 were most often injured by contact with the gate (odds ratio 2.03; 95% confidence interval 1.95–2.12), resulting in open wounds (55.4%) and soft-tissue injuries (24.2%).ConclusionsGiven the clear dichotomy between injury characteristics of patients aged <2 years and patients aged 2 to 6 years of age, as well as the prevalence of preventable injuries, greater efforts are needed to promote proper usage, ensure safety in product design, and increase awareness of age-related recommendations for use of gates. 相似文献
98.
Thyroid autoantibodies in pregnancy are associated with hypertensive disorders of pregnancy: Ma'anshan Birth Cohort Study
下载免费PDF全文
![点击此处可从《Clinical endocrinology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
99.
A cross-sectional study design was applied amongst a random sample (n = 10158) of Chinese adolescents. Self-completed questionnaires, including demographic characteristics, Internet use situation, Youth Internet Addiction Test, Youth Social Support Rating Scale and Zung Self-rating Depression Scale were utilized to examine the study objectives. Among the study population, the prevalence rate of Internet addiction was 10.4%, with 1038 (10.2%) moderately and 21 (0.2%) severely addicted to the Internet. Results from the multivariate logistic regression analyses suggested that a variety of related factors have significant effects on Internet addiction (parental control, per capita annual household income, academic performance, the access to Internet, online activities). The correlation coefficients showed that Internet addiction was negatively correlated with social support and positively associated with depression. Social support had a significant negative predictive effect on Internet addiction. The mediating effect of depression between social support and Internet addiction was remarkable. 相似文献
100.