More and more high-rise buildings have been built in big cities       space.

A．in search of

B．in place of

C．for lack of

D．for fear of

孕妇，28岁，G2P0，36周妊娠，重度子痫前期。摔倒3h后自觉下腹不适，有少量 * * 流血而入院。查体：宫缩30s／min，强度弱，子宫底高度33cm，软，子宫右侧有轻度局限性压痛，估计胎儿体重3000g，胎心140次／分。为确诊，应首选（）

A．B超

B． * * 检查

C．肛门检查

D．放射性核素扫描

E．腹部X线摄片