（9分）相隔一定距离的A、B两球，质量相等，假定它们之间存在着恒定的斥力作用．原来两球被按住，处在静止状态．现突然松开，同时给A球以初速度v₀，使之沿两球连线射向B球，B球初速度为零．若两球间的距离从最小值（两球未接触）到刚恢复到原始值所经历的时间为t₀，求B球在斥力作用下的加速度．

—The doctor told me _______ too much but I find it difficult.

—The doctor is right. The less you drink, _______ you will be. [ ]

A. don't drink; the healthier

B. not to drink; the healthier

C. not to drink; the more healthier

D. don't drink; healthier