“危机是对一个社会系统的基本价值和行为准则架构产生严重威胁,并且在时间压力和不确定性极高的情况下,必须对其做出关键决策的事件。”由于危机事件往往具有发生的突然性、不可预测性、不确定性和广泛的社会影响等特点,是信息量最为集中、公众信息需求最为旺盛、信息流 “Crisis is an event that poses a serious threat to the structure of basic social values ​​and codes of conduct and must make key decisions about it in times of extreme stress and uncertainty.” "As crisis events often have The sudden, unpredictable, unpredictable and uncertain social impacts are the most informative, the most populous for public information, the most important for information flow