A cup of milk

A poor student sell products house by house with the aim is to find some money to pay for his student fees...
One day, during the night time, he feel starving and pocket have $1 only. He plan to ask for dinner next house.

When he reached the next house, a young pretty girl open door and he lost courage to ask for a dinner, he only ask for a cup of water. The young pretty observed the student's face, show that he so hungry, then the young pretty gal give a huge cup of milk to the student...The student take it and drink it quickly and ask the young pretty girl...

Student : How much should i pay for it?
Young pretty gal: You have owe me nothing...mom told me always, doing charity never ask for return...(smiling...)

Student : ...[the student stiff for a moment]...Hmm...thanks

The student feel comfidence and full of energy, nay feel nice and comfidence to The God and to human in the world...because at the moment, he feel serbonian bog and lost to the world and try to give up everything...

Few years later, the young pretty girl illness and the doctor have no idea to cure the sick. The young pretty gal's family had sent the young pretty girl to city looking for specialist doctor to cure the young pretty girl.

When the doc hear that the young girl come from the town, he feel exciting and have the specail feeling for the girl.
After checked the young pretty girl, the doc promise to try all his best to cure the young pretty girl...After a certain times, the young pretty girl stage by stage and cureness from illness...She win for the fight with the virus.

The hospital account department had send the medicine bill to the doc ask for approve...When the doc get the bill, he just give signature and he take care the whole amount, FOC to the young pretty girl. He put some words at the corner of medicine bill...

When the young pretty girl recieved the bill, she scare to open up the bill, because she know that the medicine fees are so expensive and she never paid up the bill althought working whole life.
Finally, she open up the bill and she notice that at the coener, there are some words for her...

"...a cup of milk was good enough to paid for the medicine bill..."