女性，23岁，停经51天，右下腹剧痛3小时，伴肛门坠胀感入院。查体：血压120/80mmHg，脉搏90次/分，腹腔穿刺抽出不凝血。Hb120g/L。血β-hCG4000U/L。最佳的处理是（）

A.腹腔镜探查手术

B.补充血容量的同时剖腹探查

C.输液观察

D.MTX肌内注射

E.中药治疗

Our neighbours gave _________ a baby bird yesterday that hurt _________ when it fell from its nest.

A．us, it

B．us, itself

C．ourselves, itself

D．ourselves, it