The Chicago Bulls entered Saturday’s game against the top-seeded Miami Heat hounded by questions about their ability to compete with the best teams in the Eastern Conference. The game provided the same answer: With one week left in the regular season, the Bulls still can’t beat the best. The Heat started red-hot, opening 12-for-13 from the field en route to a 127-109 victory at the United Center. Even after ceding the early lead, the Bulls traded shots to keep their deficit within single digits until the second half.