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医生:
May I help you? 
需要我帮忙吗?
大卫:
Would you fill this prescription?
你能为我配药方吗?
医生:
OK, please have a seat and wait.
好的，请稍坐。
大卫:
All right.
好的.
医生:
That`s OK. Here you are.
好了.给你.
大卫:
Thank you. How much is it?
谢谢.多少钱?
医生:
That is 25 yuan.
元.
大卫:
Here is the money.
给你钱.
医生:
Thank you.
谢谢.
大卫:
By the way, how do I take the medicine?
对了.我怎样吃这药? 
医生:
Take 1 bills after every meal with a glass of water.
每天饭后用白开水服用一粒药丸.
大卫:
I see.
我知道了.