meaning of sentences

hello

I read a story and I am asked to explain the following sentences which are in the text:

1-good living
2-feeling ha had done his duty
3- a hastily summoned doctor
4- a fact that threw doubt on
5- the public eye
6- the novelty had worn off
7- a mere seventeen months

The first one, reading the text, is the wealthy life of the character.
but then the second one I dont understand. I know the meaning of duty but I cant explain the sentence in english.Then, I dont know number 3,4,6,7
but with number 5 I have a doubt:does it mean people?
Could you help me with this?
Thank you in advance.
Ana.

[Tdol]

2- literal meaning- he felt he had don e what was expected or could be demanded of him. If things had gone wrong, it would not have been because he had failed to do what was expected.
3- literal again- the doctor was called quickly, presumably because it was an emergency
4- the fact made something look wrong in a theory or explanation
5- if something is in the public eye, it is getting a lot of attention in the media, etc
6- something had stopped being new and exciting
7 only 17 months