今天在做OG数学题时，遇到了这样两个语句。 （1）Point R is twice as far from P as from Q.
请问，为什么讲解理解为：R到Q的距离是R到P的两倍？
（2）PS 151题 A toy store regularly sells all stock at a discount of 20 percent to 40 percent. If an additional 25 percent were deducted from the discount price during a special sale, what would be the lowest possible price of a toy costing $16 before any discount?