只有心理上的自我安慰。
想用开水烫死细菌，对开水的温度及持续时间是有要求的，以沙门氏菌为例，至少要在70-80℃环境中持续5分钟才可以杀死。用饭店的开水简单烫一下碗筷其实很难杀死细菌，更多的是心理安慰。
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