Why and how is the citric acid that beneficial for this condition?

The stones can cause unbearable pain. Those persons that are disposed to get these stones should consume more lemon juices so as to prevent them. Even many doctors and experts claim that lemon juice is great for the therapy of patients with kidney stone disease.
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Tesha:
So he and his class went into the library.
(9 October 2016)

Tesha:
There was this guy in that class who noticed me and was staring at me.
(9 October 2016)

Tesha:
There was a class that was walking to the library and I looked up to see what class was it.
(9 October 2016)

Tesha:
At lunch me and my friends sit by the library.
(9 October 2016)

Shaunda:
Help me please someone answer?
(9 October 2016)

Shaunda:
What could this be it bleeds than stops please help at the moment its nothing happening.
(9 October 2016)

Shaunda:
Okay so i have been bleeding since August 28th and it is now October 9th it stopped 2 days ago and now i have no bleeding just pink when i wipe and when i looked in the toilet i saw a pink reddish tissue looking thing.
(9 October 2016)

Delores:
My name s Aryan?
(9 October 2016)

Delores:
The first thing I think about is Hitler and the Aryans also the Aryan brotherhood ect... what would be the first thing you think about if you saw me and knew my name?
(9 October 2016)

Delores:
I hate how everyone thinks my name is pretty or whatever but I hate it.
(9 October 2016)