What we learned: Bruins bounce back and avoid a case of the Blues

The Bruins needed a bounce-back effort after they unraveled in their loss to the Flyers in Philadelphia just 24 hours prior.

They got just that against a red-hot St. Louis Blues squad that entered Thursday with a 4-1-1 mark in their prior six.

Bruce Cassidy’s squad relinquished another lead after scoring first on Torey Krug’s fifth goal of the season. But they overcame their defensive issues and got timely goals from David Backes’ tip-in, Chris Wagner’s highlight reel breakaway, Brad Marchand’s insurance marker and Sean Kuraly’s empty netter after Ryan O’Reilly and Carl Gunnarsson gave the Blues the 2-1 lead.

“It was a big game for us. The week hasn’t been what we would’ve hoped,” Marchand…