男性，35岁，阑尾切除术后第1天，体温升高，大便次数增多，解黏液便，有里急后重，考虑并发了盆腔脓肿，首选的检验方法是（）

A.腹部B超

B.腹腔穿刺

C.直肠指检

D.大便细菌培养

E.X线腹部透视

As we took our seats on the bus, I noticed a woman（）with a young adult close to us.

A.sit

B.be sit

C.sitting

D.sits