Solution: The juice is a bottle, and finally Jia Jia drank it all at once, that is to say, she drank a bottle of juice four times. In addition, in the process of drinking fruit juice, Jia Jia added water three times, namely 1/6, 1/3 and 1/2, so the last water Jia Jia drank was1/6+1/3+. So Jia Jia drinks as much juice as water.