In the story "A Very Short Story" what is the significance of the ending? How does it relate to the beginning of the story?

n the story "A Very Short Story" what is the significance of the ending?

The falling action mostly focuses on Luz and her life after deciding to remain in Italy to open a hospital; she meets the major of an Italian battalion, is charmed by him and decides to let the American know that their love was silly and immature:

Living in the muddy, rainy town in the winter, the major of the battalion made love to Luz, and she had never known Italians before, and finally wrote to the States that theirs had only been a boy and girl affair. She was sorry ...

The story, however, ends with Luz neither marrying the Italian nor ever hearing back from the American, who contracts gonorrhea from a sales woman he shares a taxi with-a sudden, indeterminate ending that reveals Hemingway's dark view of relationships and intimacy.

Explanation:

How does it relate to the beginning of the story?

The short story begins abruptly, with an exposition that introduces the main characters (the soldier and Luz) and the context of the First World War:

One hot evening in Padua they carried him up onto the roof and he could look out over the top of the town. There were chimney swi ...