男性，30岁。膝关节间歇性隐痛、肿胀6个月。查体：胫骨上端内侧肿胀，触之有乒乓球感。X线检查：胫骨上端偏内侧呈膨胀性肥皂泡样骨质破坏，横径大于纵径。诊断首先考虑（）。

A.骨囊肿

B.动脉瘤样骨囊肿

C.软骨母细胞瘤

D.溶骨型骨肉瘤

E.骨巨细胞瘤

The janitor's long service with the company was ______ a present.

A．confirmed by

B．recorded with

C．appreciated by

D．acknowledged with