China and the United States held their first strategic dialogue on August 1 and _______ to increase co-operation and constructive relations.

A．agreed

B．would agree

C．have agreed

D．had agreed

患者女性，68岁。转移性右下腹疼痛，16小时，无恶心呕吐。查体：体温38.50C，无腹肌紧张，右下腹压痛、反跳痛不明显，结肠充气试验（+）,血常规：白细胞8.7×109/L,中性粒细胞84%，尿常规正常，该患者首先的治疗方法是

A．局部理疗

B．禁食、置胃管

C．手术

D．应用抗生素

E．中药治疗