treat sb as 表示“以.方式对待某人”, 例如：The local people treat him as a hero.（当地人把他当做英雄来对待.） treat sb for 后面一般加sth,表示“医治,治疗” 例如：She was treated for sunstroke.（她因为中暑而接受治疗.） treat sb,一般后面接（to sth）表示“款待某人” 例如：She treated him to lunch.（她请他吃午餐.） Don't worry about the cost---I'll treat you.（别担心费用---我请你.）
