Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 艾薇每天喝2.5升的水。艾薇应该买多少瓶2升的水来满足她4天的需求？


### Response:
 艾薇在4天内消耗了2.5升 x 4 = <<2.5*4=10>>10升的水。
所以艾薇应该买10升/2升 = <<10/2=5>>5瓶2升的水。