Names are important in Ruth. Naomi's name means pleasant. It's a nice name. Too nice, Naomi decides for her present circumstances, and when the women of Bethlehem come out to meet her as she returns after ten disastrous years, she changes it to Mara - bitter. Each chapter in Ruth begins and ends in the same place, with some kind of journey or progression in between that changes things.
Chapter one begins and ends in Bethlehem.
It begins with a family and hopes for the future. As Naomi says, she went out full. But it ends back in Bethlehem empty. No husband, no sons, no hope for the future. The only thing to mitigate Naomi's circumstances is that she has Ruth to share her bitterness.