I was told by the doctor to drink 2-2.5 liters of water every day.
The doctor told me to drink 2-2.5 liters of water per day.
I was told by the doctor to drink about 2-2.5 liters of water every day.
（医者から毎日約2〜2.5リットルの水を飲むように私は言われた）
The doctor told me to drink 2-2.5 liters of water per day.
（一日２〜２.５リットルの水を飲むように医者が私に言った）
every day = 毎日
per day = 日ごとに
ちなみに数字の２〜２.５リットルのところは、two to two point five liters または two to two and a half liters という風に言います。
I was told by my doctor to drink 2-2.5 litres of water every day.
The doctor told me to drink 2-2.5 litres of water per day.
「医者から毎日約2〜2.5リットルの水を飲むように言われた。」
"I was told by my doctor to drink 2-2.5 litres of water every day.”
"The doctor told me to drink 2-2.5 litres of water per day.”
医者から - by my doctor
毎日 - every day, per day
リットル - litre (オーストラリア英語、イギリス英語), liter (アメリカ英語)
水を飲む - drink water
言われた - was told
日本 
オーストラリア 
