This passage is from The Children's Bach by Helen Garner
How strange it is that in a city the size of Melbourne it is possible for two people who have lived almost as sister and brother for five years as students to move away from each other without even saying goodbye, to conduct the ordinary business of their lives within a couple of miles of each other’s daily rounds, and yet never to cross each other’s paths. To marry, to have children; to fail at one thing and to take up another, to drink and dance in public places, to buy food in supermarkets and petrol at service stations, to read of the same murders in the same newspapers, to shiver in the same cold mornings, and yet never to bump into each other. Eighteen, twenty years may pass! How strange!
Does "to conduct the ordinary business of their lives" mean "to work in a job that they can live on it"?
Does the whole sentence in bold mean "to work in a job that they can live on it and their workplaces were not very far from of their house"
Does "daily round" mean "usual activities that they did around their house"?
Can we say "ordinary business of their live" means "usual activities of their lives"? But in this case it somehow means the same as "daily round".