全文获取类型
收费全文 | 50964篇 |
免费 | 3937篇 |
国内免费 | 123篇 |
专业分类
耳鼻咽喉 | 408篇 |
儿科学 | 2166篇 |
妇产科学 | 1501篇 |
基础医学 | 6959篇 |
口腔科学 | 541篇 |
临床医学 | 6774篇 |
内科学 | 9647篇 |
皮肤病学 | 859篇 |
神经病学 | 4993篇 |
特种医学 | 1046篇 |
外国民族医学 | 38篇 |
外科学 | 4810篇 |
综合类 | 521篇 |
一般理论 | 100篇 |
预防医学 | 7291篇 |
眼科学 | 715篇 |
药学 | 2742篇 |
中国医学 | 98篇 |
肿瘤学 | 3815篇 |
出版年
2024年 | 54篇 |
2023年 | 477篇 |
2022年 | 657篇 |
2021年 | 1608篇 |
2020年 | 973篇 |
2019年 | 1537篇 |
2018年 | 1766篇 |
2017年 | 1286篇 |
2016年 | 1356篇 |
2015年 | 1437篇 |
2014年 | 2024篇 |
2013年 | 2916篇 |
2012年 | 4106篇 |
2011年 | 4268篇 |
2010年 | 2256篇 |
2009年 | 1970篇 |
2008年 | 3516篇 |
2007年 | 3464篇 |
2006年 | 3229篇 |
2005年 | 3126篇 |
2004年 | 2839篇 |
2003年 | 2545篇 |
2002年 | 2380篇 |
2001年 | 321篇 |
2000年 | 203篇 |
1999年 | 323篇 |
1998年 | 476篇 |
1997年 | 357篇 |
1996年 | 302篇 |
1995年 | 310篇 |
1994年 | 261篇 |
1993年 | 231篇 |
1992年 | 142篇 |
1991年 | 142篇 |
1990年 | 120篇 |
1989年 | 106篇 |
1988年 | 117篇 |
1987年 | 82篇 |
1986年 | 97篇 |
1985年 | 107篇 |
1984年 | 125篇 |
1983年 | 105篇 |
1982年 | 125篇 |
1981年 | 159篇 |
1980年 | 106篇 |
1979年 | 65篇 |
1978年 | 58篇 |
1977年 | 62篇 |
1976年 | 58篇 |
1974年 | 55篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
991.
992.
993.
Catherine R. Ayers Mary E. Dozier Charles T. Taylor Tina L. Mayes James O. E. Pittman Elizabeth W. Twamley 《Cognitive therapy and research》2018,42(3):315-327
While cognitive-behavioral therapy for hoarding disorder (HD) has resulted in significant reductions in symptoms, most individuals continue to have significant hoarding symptoms following treatment. This investigation sought to extend the literature on the behavioral treatments for hoarding by examining (1) group cognitive rehabilitation and exposure/sorting therapy (CREST) and (2) group exposure therapy (ET) for hoarding. Participants in both studies reported significant decreases in hoarding symptom severity from baseline to post-treatment on all primary outcome measures using mixed-effects linear regression models with the intent to treat sample. Participants who received group CREST reported statistically significant reductions in anxiety, depression, and overall severity at post-treatment, while participants who received group ET did not. Results provide preliminary evidence for both group CREST and group ET as effective treatments for hoarding disorder. 相似文献
994.
Morgan K. Boes Rachel E. Bollaert Richard M. Kesler Yvonne C. Learmonth Mazharul Islam Matthew N. Petrucci Robert W. Motl Elizabeth T. Hsiao-Wecksler 《Archives of physical medicine and rehabilitation》2018,99(3):484-490
Objective
To determine whether a powered ankle-foot orthosis (AFO) that provides dorsiflexor and plantar flexor assistance at the ankle can improve walking endurance of persons with multiple sclerosis (MS).Design
Short-term intervention.Setting
University research laboratory.Participants
Participants (N=16) with a neurologist-confirmed diagnosis of MS and daily use of a prescribed custom unilateral passive AFO.Interventions
Three 6-minute walk tests (6MWTs), 1 per footwear condition: shoes (no AFO), prescribed passive AFO, and portable powered AFO (PPAFO). Assistive devices were worn on the impaired limb.Main Outcome Measures
Distance walked and metabolic cost of transport were recorded during each 6MWT and compared between footwear conditions.Results
Each participant completed all three 6MWTs within the experimental design. PPAFO use resulted in a shorter 6MWT distance than did a passive AFO or shoe use. No differences were observed in metabolic cost of transport between footwear conditions.Conclusions
The current embodiment of this PPAFO did not improve endurance walking performance during the 6MWT in a sample of participants with gait impairment due to MS. Further research is required to determine whether expanded training or modified design of this powered orthosis can be effective in improving endurance walking performance in persons with gait impairment due to MS. 相似文献995.
996.
The effect of unit,depth, and probe load on the reliability of muscle shear wave elastography: Variables affecting reliability of SWE 下载免费PDF全文
997.
Novel Use of Ultrasound to Teach Reproductive System Physical Examination Skills and Pelvic Anatomy 下载免费PDF全文
998.
Fernando G. Zampieri Theodore J. Iwashyna Elizabeth M. Viglianti Leandro U. Taniguchi William N. Viana Roberto Costa Thiago D. Corrêa Carlos Eduardo N. Moreira Marcelo O. Maia Giulliana M. Moralez Thiago Lisboa Marcus A. Ferez Carlos Eduardo F. Freitas Clayton B. de Carvalho Bruno F. Mazza Mariza F. A. Lima Grazielle V. Ramos Aline R. Silva Fernando A. Bozza Jorge. I. F. Salluh Marcio Soares for the ORCHESTRA Study Investigators 《Intensive care medicine》2018,44(9):1512-1520
Purpose
Frail patients are known to experience poor outcomes. Nevertheless, we know less about how frailty manifests itself in patients’ physiology during critical illness and how it affects resource use in intensive care units (ICU). We aimed to assess the association of frailty with short-term outcomes and organ support used by critically ill patients.Methods
Retrospective analysis of prospective collected data from 93 ICUs in Brazil from 2014 to 2015. We assessed frailty using the modified frailty index (MFI). The primary outcome was in-hospital mortality. Secondary outcomes were discharge home without need for nursing care, ICU and hospital length of stay (LOS), and utilization of ICU organ support and transfusion. We used mixed logistic regression and competing risk models accounting for relevant confounders in outcome analyses.Results
The analysis consisted of 129,680 eligible patients. There were 40,779 (31.4%) non-frail (MFI?=?0), 64,407 (49.7%) pre-frail (MFI?=?1–2) and 24,494 (18.9%) frail (MFI?≥?3) patients. After adjusted analysis, frailty was associated with higher in-hospital mortality (OR 2.42, 95% CI 1.89–3.08), particularly in patients admitted with lower SOFA scores. Frail patients were less likely to be discharged home (OR 0.36, 95% CI 0.54–0.79) and had higher hospital and ICU LOS than non-frail patients. Use of all forms of organ support (mechanical ventilation, non-invasive ventilation, vasopressors, dialysis and transfusions) were more common in frail patients and increased as MFI increased.Conclusions
Frailty, as assessed by MFI, was associated with several patient-centered endpoints including not only survival, but also ICU LOS and organ support.999.
Joanna E. Long Saif Khairat Elizabeth Chmelo Mary H. Palmer 《Geriatric nursing (New York, N.Y.)》2018,39(2):230-237
The purpose of this study was to explore the efficacy and acceptability of an innovative, electronically delivered self-management intervention for urinary incontinence (UI) that included daily mindfulness practice, completion of sequential bladder diaries, and bladder health education to improve UI in older women living independently in a retirement community. A mixed methods pilot study was conducted over ten weeks using a custom website or CD. Ten women were recruited and 8 completed the study; 5 of those (71%) experienced fewer daily UI episodes post intervention (p = 0.055). The women also reported a statistically significant decrease in the impact UI had on their everyday life (p = 0.04). Seventy-one percent (N = 5) reported subjective improvement in UI, and high acceptability scores also were achieved. The intervention was both effective in helping older women self-manage UI and acceptable to the population group. Further research is needed with a larger and diverse population of older women. 相似文献
1000.
Seelwan Sathitratanacheewin Ruth A. Engelberg Lois Downey Robert Y. Lee James A. Fausto Helene Starks Ben Dunlap James Sibley William Lober Elizabeth T. Loggers Nita Khandelwal J. Randall Curtis 《Journal of pain and symptom management》2018,55(1):75-81