What we learned: Bruins’ well-rounded effort pays off

Things are still a work in progress, but the Boston Bruins got a needed all-around effort from all 20 guys Thursday night against the Edmonton Oilers at TD Garden.

Yes, Boston’s first line did the bulk of the scoresheet-related work again, as they set the tone with two power-play goals and a late third-period empty-netter. However, the second, third and fourth lines, along with their three defensive pairings, also did their share of the lifting against Connor McDavid and company.

“Special teams were good, and obviously that makes a difference; we got a couple [of goals] on our power play. Discipline was good. Team defense was good,” head coach Bruce Cassidy said following Boston’s 4-1…