為病人沐浴時，哪一部位應最後清潔？

沐浴的清潔順序遵循「由乾淨到髒污（Clean to dirty）」的原則，目的是最大程度降低細菌交叉污染（Cross-contamination）的風險。會陰部（Perineal area）因接近排泄口，帶有大量常態菌叢，若先清潔會陰部再清潔其他部位，會將細菌帶至身體其他部位引發感染。因此，會陰部必須排在最後清潔。

The perineal area should be cleaned last during a bath to adhere to the principle of cleaning from the least contaminated to the most contaminated areas. This area harbors a high concentration of bacteria and waste products, so cleaning it last prevents cross-contamination of cleaner body parts like the face, chest, and arms. This approach minimizes the risk of introducing pathogens to sensitive or sterile sites.