全文获取类型
收费全文 | 43608篇 |
免费 | 3844篇 |
国内免费 | 113篇 |
专业分类
耳鼻咽喉 | 341篇 |
儿科学 | 1018篇 |
妇产科学 | 967篇 |
基础医学 | 6425篇 |
口腔科学 | 656篇 |
临床医学 | 4360篇 |
内科学 | 8469篇 |
皮肤病学 | 542篇 |
神经病学 | 4069篇 |
特种医学 | 1212篇 |
外国民族医学 | 3篇 |
外科学 | 6239篇 |
综合类 | 1074篇 |
一般理论 | 98篇 |
预防医学 | 4188篇 |
眼科学 | 1324篇 |
药学 | 3490篇 |
中国医学 | 45篇 |
肿瘤学 | 3045篇 |
出版年
2023年 | 287篇 |
2022年 | 416篇 |
2021年 | 939篇 |
2020年 | 582篇 |
2019年 | 940篇 |
2018年 | 972篇 |
2017年 | 731篇 |
2016年 | 816篇 |
2015年 | 1008篇 |
2014年 | 1377篇 |
2013年 | 1981篇 |
2012年 | 2717篇 |
2011年 | 2908篇 |
2010年 | 1624篇 |
2009年 | 1411篇 |
2008年 | 2427篇 |
2007年 | 2542篇 |
2006年 | 2485篇 |
2005年 | 2503篇 |
2004年 | 2465篇 |
2003年 | 2158篇 |
2002年 | 2042篇 |
2001年 | 731篇 |
2000年 | 684篇 |
1999年 | 725篇 |
1998年 | 534篇 |
1997年 | 466篇 |
1996年 | 432篇 |
1995年 | 426篇 |
1994年 | 361篇 |
1993年 | 352篇 |
1992年 | 508篇 |
1991年 | 492篇 |
1990年 | 449篇 |
1989年 | 470篇 |
1988年 | 398篇 |
1987年 | 402篇 |
1986年 | 382篇 |
1985年 | 436篇 |
1984年 | 360篇 |
1983年 | 313篇 |
1982年 | 249篇 |
1981年 | 214篇 |
1980年 | 207篇 |
1979年 | 245篇 |
1978年 | 193篇 |
1977年 | 171篇 |
1974年 | 184篇 |
1973年 | 167篇 |
1972年 | 170篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
John T Kanegaye Jerry C Cheng R Ian McCaslin Douglas Trocinski Patricia D Silva 《Ambulatory Pediatrics》2005,5(4):253-257
OBJECTIVE: Accurate and complete documentation may enhance reimbursement and compliance with financial intermediary regulations, protect against litigation, and improve patient care. We measured the effect of introduction of a structured encounter form on the completeness of documentation of pediatric wound management in a teaching hospital. METHODS: The Children's Hospital Emergency Department introduced a structured encounter form for use in the documentation of wound care in place of the existing free-text dictation method. Attending physicians and trainees, all unaware of the study, had the option of using the form in place of free-text dictation for patients with lacerations requiring closure. We abstracted 100 consecutive free-text dictations from patients treated before the form's introduction. Following a 3-month run-in period, we abstracted 100 consecutive structured wound records. We compared the 2 chart types for completeness of documentation based on 20 predetermined criteria relevant to pediatric wound care. RESULTS: Overall completeness of documentation improved with structured forms (80% vs 68% for free text, P < .001), with significant improvements in 6 of 20 individual criteria. Trainees demonstrated improvement in documentation with the structured form, with the greatest improvements among senior-level residents. Documentation of the general physical examination worsened with structured charting. DISCUSSION: In an academic pediatric emergency department, the use of a structured complaint-specific form improved overall completeness of wound-care documentation. Structured encounter forms may provide for more standardized documentation for a variety of pediatric chief complaints, thereby facilitating communication and ultimately transition to template-driven systems in anticipation of an electronic medical record. 相似文献
102.
103.
Morgan HR 《The Journal of clinical investigation》1948,27(6):706-709
104.
Sharon A Cook Robert Rosser Helen Toone M Ian James Peter Salmon 《Journal of plastic, reconstructive & aesthetic surgery》2006,59(1):54-64
PURPOSE: Elective cosmetic surgery is expanding in the UK in both the public and private sectors. Because resources are constrained, many cosmetic procedures are being excluded within the National Health Service. If guidelines on who can receive such surgery are to be evidence-based, information is needed about the level of dysfunction in patients referred for elective surgery and whether this is related to their degree of physical abnormality. METHOD: Consecutive patients referred to a regional plastic surgery and burns unit for assessment for elective cosmetic surgery completed standardised measures of physical and psychosocial dysfunction, and indicated their perception of the degree of their abnormality and their preoccupation with it. We distinguished between patients referred for physical reasons or appearance reasons only, and compared levels of physical and psychosocial dysfunction in each with published values for community and clinical samples. Surgeons indicated patients' degree of objective abnormality, and we identified the relationship of dysfunction with perceived and objective abnormality and preoccupation. RESULTS: Whether patients sought surgery for physical or appearance reasons, physical function was normal. Those seeking surgery for appearance reasons only had moderate psychosocial dysfunction, but were not as impaired as clinical groups with psychological problems. Patients seeking the correction of minor skin lesions for purely appearance reasons reported excellent physical and psychosocial function. Level of function was related (negatively) to patients' preoccupation with abnormality rather than to their perceived or objective abnormality. CONCLUSIONS: In general, patients referred for elective cosmetic surgery did not present with significant levels of dysfunction. Moreover, levels of functioning were related to preoccupation rather than to objective abnormality. Therefore, for most patients, whether surgical treatment is generally appropriate is questionable. Future guidelines must seek to identify the small minority who do have a clinical need for surgery. 相似文献
105.
106.
Distal radial fractures Injectable calcium phosphate bone cement versus conventional treatment 总被引:2,自引:0,他引:2
AMEDLINEsearchwasconductedtoidentifystudiespublishedfromJanuary1999toMarch2004thatcom-paredinjectablecalciumphosphatebone(NorianSRS)cementwithconventionaltreatmentindistalradialfrac-tures.Fromalistof13articlesidentifiedfromthesearchstrategy,fourarticleswe… 相似文献
107.
Jeffrey A Morgan Ranjit John Yookyung Park Linda J Addonizio Mehmet C Oz Niloo M Edwards Jan M Quaegebeur Ralph S Mosca 《The Journal of heart and lung transplantation》2005,24(1):58-62
BACKGROUND: Many cardiac transplant programs have liberalized donor eligibility criteria in an attempt to maximize donor supply and to accommodate increasing demand. Although many studies have evaluated the potential adverse effects of prolonged donor ischemic time (DIT) in adults undergoing cardiac transplantation, relatively few have focused specifically on pediatric recipients that include a substantial number of patients and long-term follow-up. The focus of this study was to examine the effect of extended DIT on mortality after pediatric heart transplantation. METHODS: We conducted a retrospective review of our pediatric cardiac transplant experience in the past 11 years, comparing patients who received allografts and had ischemic times >240 minutes with those who had ischemic times <240 minutes. RESULTS: A total of 129 pediatric patients (<19 years) underwent orthotopic heart transplantation, of whom 78 (60.5%) had DIT <240 minutes and 51 (39.5%) had DIT >240 minutes. We found no statistically significant difference in age, sex, race, height, weight, or donor age between the groups (p = not significant). Post-transplant survival at 1, 5, and 10 years was similar for both groups: 91.2%, 88.0%, and 85.2%, respectively, for patients with DIT <240 minutes vs 89.6%, 87.2%, and 79.8%, respectively, for patients with DIT >240 minutes (p = 0.433). Additionally, using Cox proportional hazard models, extended DIT >240 minutes was not a statistically significant independent predictor of post-transplant mortality (odds ratio, 0.655; 95% confidence interval, 0.518-0.972; p = 0.684; standard error = 0.468). CONCLUSION: Procurement of hearts from distant locations with associated extended DIT is justified in the setting of increased demand and a fixed donor population. 相似文献
108.
109.
110.
Human rhinoviruses: the cold wars resume. 总被引:1,自引:0,他引:1
Ian M Mackay 《Journal of clinical virology》2008,42(4):297-320