Narrator and point of view

The short story “Vitamins” by Raymond Carver is told by a first-person narrator, who is also the main character: “I had a job and Patti didn't. I worked a few hours a night for the hospital. It was a nothing job. I did some work, signed the card for eight hours, went drinking with the nurses”. 

The narrator tells the story from his point of view and only observes the behavior of other characters. Unlike typical first-person narrators, his account is detached. For example, when he talks about Sheila getting drunk and passing out, the narrator tells the story matter-of-factly, without any trace of emotional involvement: 

But Sheila got drunk early and passed out. She passed out on her feet, fell over, and didn't wake up for hours. One minute she was standing in the midd...