全文获取类型
收费全文 | 30463篇 |
免费 | 2557篇 |
国内免费 | 67篇 |
专业分类
耳鼻咽喉 | 345篇 |
儿科学 | 831篇 |
妇产科学 | 678篇 |
基础医学 | 4262篇 |
口腔科学 | 448篇 |
临床医学 | 3397篇 |
内科学 | 5696篇 |
皮肤病学 | 442篇 |
神经病学 | 2927篇 |
特种医学 | 1126篇 |
外科学 | 4366篇 |
综合类 | 879篇 |
现状与发展 | 1篇 |
一般理论 | 46篇 |
预防医学 | 2864篇 |
眼科学 | 708篇 |
药学 | 2185篇 |
1篇 | |
中国医学 | 53篇 |
肿瘤学 | 1832篇 |
出版年
2022年 | 286篇 |
2021年 | 571篇 |
2020年 | 345篇 |
2019年 | 534篇 |
2018年 | 632篇 |
2017年 | 423篇 |
2016年 | 545篇 |
2015年 | 595篇 |
2014年 | 769篇 |
2013年 | 1185篇 |
2012年 | 1700篇 |
2011年 | 1681篇 |
2010年 | 1012篇 |
2009年 | 960篇 |
2008年 | 1547篇 |
2007年 | 1563篇 |
2006年 | 1423篇 |
2005年 | 1562篇 |
2004年 | 1568篇 |
2003年 | 1388篇 |
2002年 | 1265篇 |
2001年 | 745篇 |
2000年 | 742篇 |
1999年 | 736篇 |
1998年 | 379篇 |
1997年 | 270篇 |
1996年 | 288篇 |
1995年 | 276篇 |
1994年 | 220篇 |
1993年 | 232篇 |
1992年 | 536篇 |
1991年 | 483篇 |
1990年 | 458篇 |
1989年 | 472篇 |
1988年 | 434篇 |
1987年 | 390篇 |
1986年 | 383篇 |
1985年 | 395篇 |
1984年 | 296篇 |
1983年 | 277篇 |
1982年 | 225篇 |
1981年 | 223篇 |
1980年 | 179篇 |
1979年 | 236篇 |
1977年 | 179篇 |
1976年 | 174篇 |
1975年 | 163篇 |
1974年 | 221篇 |
1973年 | 178篇 |
1971年 | 167篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Breanne E. Kunstler Jill L. Cook Joanne L. Kemp Paul D. O’Halloran Caroline F. Finch 《Journal of Science and Medicine in Sport》2019,22(1):2-10
Objectives
To determine: (i) the behaviour change techniques used by a sample of Australian physiotherapists to promote non-treatment physical activity; and (ii) whether those behaviour change techniques are different to the techniques used to encourage adherence to rehabilitation exercises.Design
Cross-sectional survey.Method
An online self-report survey was advertised to private practice and outpatient physiotherapists treating patients with musculoskeletal conditions. The use of 50 behaviour change techniques were measured using five-point Likert-type scale questions.Results
Four-hundred and eighty-six physiotherapists responded to the survey, with 216 surveys fully completed. Most respondents (85.1%) promoted non-treatment physical activity often or all of the time. Respondents frequently used 29 behaviour change techniques to promote non-treatment physical activity or encourage adherence to rehabilitation exercises. A similar number of behaviour change techniques was frequently used to encourage adherence to rehabilitation exercises (n = 28) and promote non-treatment physical activity (n = 26). Half of the behaviour change techniques included in the survey were frequently used for both promoting non-treatment physical activity and encouraging adherence to rehabilitation exercises (n = 25). Graded tasks was the most, and punishment was the least, frequently reported technique used to promote non-treatment physical activity and encourage adherence to rehabilitation exercises.Conclusions
Respondents reported using similar behaviour change techniques to promote non-treatment physical activity and encourage adherence to rehabilitation exercises. The variability in behaviour change technique use suggests the behaviour the physiotherapist is promoting influences their behaviour change technique choice. Including the frequently-used behaviour change techniques in non-treatment physical activity promotion interventions might improve their efficacy. 相似文献2.
3.
Dana Franzen-Klein Mark Jankowski Charlotte L. Roy Hoa Nguyen-Phuc Da Chen Lorin Neuman-Lee 《Journal of toxicology and environmental health. Part A》2020,83(2):45-65
ABSTRACTDomestic chickens (Gallus gallus domesticus) were exposed to imidacloprid by gavage once daily for 7 consecutive days at 0, 0.03, 0.34, 3.42, 10.25, and 15.5 mg/kg/day (n = 20 per group; 5 6-week-old males, 5 6-week-old females, 5 9-week-old males, and 5 9-week-old females). The severity and duration of neurobehavioral abnormalities were recorded. Components of the innate and adaptive immune system were assessed with 7 standard functional assays. Temporary neurobehavioral abnormalities were observed in a dose-dependent manner, including muscle tremors, ataxia, and depressed mentation. Based upon mean clinical severity scores, the no observed adverse effect level (NOAEL) was 3.42 mg/kg/day, and the lowest observed adverse effect level (LOAEL) was 10.25 mg/kg/day. The effective dose value for the presence of any neurobehavioral abnormalities in 50% of the test group (ED50) was 4.62 ± 0.98 mg/kg/day. The ED50 for an adjusted score that included both severity and duration of neurobehavioral abnormalities was 11.24 ± 9.33 mg/kg/day. These ED50 values are equivalent to a 1 kg bird ingesting 29 or 70 imidacloprid treated soybean seeds respectively. Immunotoxicity was not documented, possible causes include the assays were insensitive, relevant immune functions were not examined, or imidacloprid is not immunotoxic at this dosing schedule in this species. Neurobehavioral abnormalities were a more sensitive indicator of the sublethal effects of imidacloprid than immunotoxicity. 相似文献
4.
Marginal rate-based analyses are widely used for the analysis of recurrent events in clinical trials. In many areas of application, the events are not instantaneous but rather signal the onset of a symptomatic episode representing a recurrent infection, respiratory exacerbation, or bout of acute depression. In rate-based analyses, it is unclear how to best handle the time during which individuals are experiencing symptoms and hence are not at risk. We derive the limiting value of the Nelson-Aalen estimator and estimators of the regression coefficients under a semiparametric rate-based model in terms of an underlying two-state process. We investigate the impact of the distribution of the episode durations, heterogeneity, and dependence on the asymptotic and finite sample properties of standard estimators. We also consider the impact of these features on power in trials designed to test intervention effects on rate functions. An application to a trial of individuals with herpes simplex virus is given for illustration. 相似文献
5.
Fabrice Barlesi Edward B. Garon Dong-Wan Kim Enriqueta Felip Ji-Youn Han Joo-Hang Kim Myung-Ju Ahn Mary Jo Fidler Matthew A. Gubens Gilberto de Castro Veerle Surmont Qiao Li Anne C. Deitz Gregory M. Lubiniecki Roy S. Herbst 《Journal of thoracic oncology》2019,14(5):793-801
Introduction
In the phase II/III KEYNOTE-010 study (ClinicalTrials.gov, NCT01905657), pembrolizumab significantly prolonged overall survival over docetaxel in patients with previously treated, programmed death ligand 1–expressing (tumor proportion score ≥ 1%), advanced NSCLC. Health-related quality of life (HRQoL) results are reported here.Methods
Patients were randomized 1:1:1 to pembrolizumab 2 or 10 mg/kg every 3 weeks or docetaxel 75 mg/m2 every 3 weeks. HRQoL was assessed using European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire (QLC) Core 30 (C30), EORTC QLQ–Lung Cancer 13 (LC13), and EuroQoL-5D. Key analyses included mean baseline-to-week-12 change in global health status (GHS)/quality of life (QoL) score, functioning and symptom domains, and time to deterioration in a QLQ-LC13 composite endpoint of cough, dyspnea, and chest pain.Results
Patient reported outcomes compliance was high across all three instruments. Pembrolizumab was associated with better QLQ-C30 GHS/QoL scores from baseline to 12 weeks than docetaxel, regardless of pembrolizumab dose or tumor proportion score status (not significant). Compared with docetaxel, fewer pembrolizumab-treated patients had “deteriorated” status and more had “improved” status in GHS/QoL. Nominally significant improvement was reported in many EORTC symptom domains with pembrolizumab, and nominally significant worsening was reported with docetaxel. Significant prolongation in true time to deterioration for the QLQ-LC13 composite endpoint emerged for pembrolizumab 10 mg/kg compared to docetaxel (nominal two-sided p = 0.03), but not for the 2-mg/kg dose.Conclusions
These findings suggest that HRQoL and symptoms are maintained or improved to a greater degree with pembrolizumab than with docetaxel in this NSCLC patient population. 相似文献6.
7.
Peffault de Latour Rgis Huynh Lynn Ivanova Jasmina I. Totev Todor Bilginsoy Mehmet Antin Joseph Roy Anuja Duh Mei Sheng 《Annals of hematology》2020,99(4):743-752
Annals of Hematology - This study assessed treatment patterns and healthcare resource utilization (HRU) of patients with severe aplastic anemia (SAA) with insufficient response to immunosuppressive... 相似文献
8.
9.
10.
D B Irving J L Cook H B Menz 《Journal of Science and Medicine in Sport》2006,9(1-2):11-22; discussion 23-4