Unverified75% confidenceDecision RuleTime unknown
判断性价比看'单次用量成本'而非单价：泥膜正常涂厚度约3-5g/次，一支100g约用20-30次，膏体太稀需涂厚才见效的实际更费
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Unverified计算性价比应按『每次成本』而非单价：以浴缸有效浓度需300-500g计算，1kg装大约只够2-3次；宣称『可用20次』的小包装往往每次用量不足，功效打折80% similarUnverified防霉性能与理论覆盖面积存在矛盾：高含固量抗霉漆每升覆盖8-10㎡(两遍)，稀释型可达12㎡以上但膜薄防霉打折，别只看单价看实际每㎡成本78% similarUnverified浓缩型柔顺剂标注'3倍浓缩'时单次用量约15ml即可，普通型需30-40ml；换算单次成本浓缩型通常更划算且减少塑料包装77% similarUnverified湿巾厚度/含液量与性价比权衡：大包量（80抽以上）单张便宜但翻盖式若密封差，中后段易干；小包（10-20抽）单张贵但更快用完、湿润度稳定，低频使用者选小包更划算77% similarUnverified浓缩型清洁剂稀释比例1:100以上性价比高，但须严格按比例稀释，过浓会残留发黏，实际按一盖(约30ml)兑一桶(5L)水计算成本更划算76% similar
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