Unverified85% confidenceDecision RuleTime unknown
牙刷插孔间距＜2cm时刷头会互相接触导致交叉污染，选购时确认孔位间距≥2.5cm或采用独立分隔槽，多人共用家庭优先分隔式而非大通孔式
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85%
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Long-term
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Unverified孔位选择按人数+1冗余，电动牙刷刷头直径需20-25mm大孔位，普通牙刷孔位放不进电动牙刷，混用家庭需选可调节或大孔径款75% similarUnverified容量孔位按家庭人数×1.5预留：2人家庭选4孔（含备用牙刷/漱口杯位），电动牙刷用户需确认孔径≥25mm否则粗刷柄插不进74% similarUnverified缝隙刷选购看刷头厚度：厨房水槽下水口、门窗轨道需刷头厚度≤5mm的扁头缝隙刷，普通牙刷改造的刷头厚度8-10mm无法深入窄缝72% similarUnverified套管式便携牙刷（刷头反插入柄内）比对折式更卫生，因刷毛悬空不接触管壁，但整体长度通常≥16cm，占空间更大72% similarUnverified孔位选择原则：常住人数+1个冗余（客用/电动牙刷头），电动牙刷占位大，需确认孔径≥25mm或选择开放式卡槽而非封闭圆孔70% similar
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