The rich only _________ themselves in making money and had no eye for the needs and welfare of their workers．

A．occupied

B．concerned

C．enjoyed

D．devoted

下肢静脉曲张的主要并发症是

A．患肢小腿慢性溃疡

B．踝部水肿

C．血栓形成

D．神经性皮炎

E．皮肤萎缩