你是否注意到，在公共建筑中，电梯或升降机很显眼，但楼梯却很隐蔽？
Have you noticed, in public buildings, how easy it is to find the escalator or elevators and how hard it is to find the staircase?
每日多次用1：9 9稀释漂白水清洁公共地方及共用地方，如门把手、控制台、升降机按钮等。
Clean public areas as well as communal areas, such as door knobs, control panels, lift buttons, etc. with 1:99 diluted bleach several times daily.
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