公式修改如下：=IF(F2="故障维度","PON故障频发",IF(F2="测速维度","测速不达标比例高",IF(F2="投诉维度",IF(L2>100,"万投比高（用户>100,万投比>200且投诉量>=5)","小区万投比高（用户<100户，万投比>400且投诉数量>3)"),IF(F2="网络质量维度",IF(K2<>0,"重载PON口","ONU弱光比例高"),"PON故障频发"))))
