原因在于干性皮肤的问题主要出在灰浆不足——水分留不住，所以必须用含脂质的霜做封闭。

常见误区是「怕油所以不涂霜」，结果是越拍水越干。

在干燥季节或空调环境中，可在霜之前叠加修护乳，形成水—乳—霜三层，封护更持久。

Dry skin's core problem is insufficient mortar — water is not retained, so a lipid-containing cream is needed to seal it in.

The common mistake is avoiding cream for fear of grease, which leaves skin drier the more water is applied.