男，20岁。右下颌后牙肿痛1周伴开口受限、吞咽疼痛及进食困难。检查：右下颌第三磨牙部分萌出，挤压龈袋有脓液流出，咽侧壁红肿，腭垂被推向左侧。

如欲明确有无脓肿形成，最简单有效的方法是（）。

A.B超检查

B.局部穿刺

C.检查有无波动感

D.CT

E.检查有无凹陷性水肿

—What does this modern-day dinosaur look like?

—The tongue of this animal can be extended _____ of its body.

A．more than twice the length

B．twice more than the length

C．more than the length twice

D．more twice than the length