. For miles around us there was nothing but a desert, without a single plant or tree ______.

A．in the distance

B．at a distance

C．in sight

D．out of sight

女性，34岁。腹部胀痛、呕吐、停止排气排便6天。1年前曾行阑尾切除术。腹部立位X线平片示右下腹可见2个气液平面。可诊断为（）

A.右卵巢囊肿蒂扭转

B.急性盆腔炎

C.粘连性肠梗阻

D.右输卵管扭转

E.以上都不是