In response to media questions , dr yeoh reiterated that ha s three - colour response system was intended for internal communication and in fact it formed part of the government s overall response system on sars 杨医生在回应传媒提问时重申，医管局的红黄绿三色警示系统主要为内部沟通之用，事实上，医管局的系统正是政府防御沙士三级应变系统的组成部分。
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