The Rangers trail the Bruins, 2-0, in the Eastern Conference semifinals, the exact same hole they faced in the first round when they rallied to beat the Washington Capitals in seven games. If that experience is a benefit, it depends on who you ask. It was a common topic yesterday as the Rangers regrouped before tonight’s Game 3 at Madison Square Garden, with players offering a range of opinions. “You definitely don’t look back,” goalie Henrik Lundqvist said. “You look ahead now. What happened last week or even yesterday is gone. You focus on tomorrow and we approach it as a really big game for us, which it is. It’s a great challenge to come home and play a good game.” The Rangers returned home after a 5-2 loss in Game 2 on Sunday. In the first round, they lost, 1-0, in overtime to the Capitals in Game 2 before winning the next two games at Madison Square Garden. Center Brian Boyle said the feeling is the same. “They feel equally crappy,” Boyle said. “It’s disappointing. You have two opportunities and you come up short. But there’s another opportunity (tonight).” No NHL team has ever rallied from 2-0 deficits in consecutive best-of-seven series. The Rangers are blocking out thoughts like that as they try to maintain a narrow focus.