I couldn’t help but _____very worried about his illness when I heard he was in hospital because of heart disease.

A．to feel

B．feel

C．feeling

D．to have felt

下列不同类型肠梗阻的影像描述，错误的是（）

A.不完全性肠梗阻：结肠内可见到少量气体影

B.粘连性肠梗阻：假肿瘤征

C.绞窄性肠梗阻：空回肠换位征

D.小肠高位梗阻：消化管无明显积气、扩张

E.麻痹性肠梗阻：全消化管不同程度积气、扩张