患者，男性，40岁。右上腹刺伤2小时。当时即感大汗淋漓，面色苍白，口渴，呼吸困难。查体：神志清，血压60/40mmHg，全腹压痛，伴腹膜刺激征，移动性浊音阳性。

最恰当的治疗方法是（）.

A.清创缝合腹壁伤口

B.大量补液

C.血管活性药物

D.剖腹探查术

E.输血、抗休克

Dear Prof. King,

Allow me to introduce to you Mr. Liu, the bearer of this letter. He is one of my former students and is going to enter your institute after graduation here. Will you please give him some necessary guidance about the entrance examination I shall be much obliged if you will show him any favor.

Yours

Alice

What does "obliged" mean（）