题目

It was Molly's job to hand her father his brown paper lunch bag each morning before he headed off to work.      One morning,  in addition to his usual lunch bag,  Molly handed him a second paper bag.This one was worn and held together with staples (书钉).       Why two bags? her father asked.The other is something else,   Molly answered.What's in it?Just  some stuff (东西). Take it with you.      Not wanting to discuss the matter,  he put both sacks into his briefcase,  kissed Molly and rushed off. At midday he opened Molly's bag and took out the content13．若函数$y=\frac{ax+2}{x+2}$在区间（-2，+∞）上是增函数，则a的取值范围为（1，+∞）．