emergency department（ED）：医院中专门接诊急症、危重症患者的科室，提供全天候的紧急评估、抢救与初步治疗。中文常译为急诊科/急诊部。（在英式英语中也常见 accident and emergency, A&E。）
/ɪˈmɝːdʒənsi dɪˈpɑːrtmənt/
I went to the emergency department after I cut my hand.
我手割伤后去了急诊科。
After the accident, several patients were rushed to the emergency department, where doctors quickly assessed their injuries and began treatment.
事故发生后，几名伤者被迅速送到急诊科，医生很快评估伤情并开始治疗。
emergency 源自表示“突然发生、紧急情况”的词根（与“出现/发生”相关），强调事情来得突然、需要立刻处理；department 来自表示“分开、划分”的来源，指机构中的“部门/科室”。合在一起就是“处理紧急情况的医院科室”。
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