男，40岁。咽痛、咳嗽1个月余，半月前多次肌注青霉素治疗好转，但近5天来发生寒战发热，体温达39.2～40℃，伴谵妄，同时右臀注药物处胀痛较剧。体检：呼吸正常，血压96/58mmHg，咽部充血，扁桃体稍肿大，未及浅表肿大淋巴结，心律齐，肺部呼吸音粗糙，无啰音，腹平软，无压痛，肝、脾未触及，右臀部肿胀，皮肤发光，压痛明显。白细胞16×10⁹/L，有核左移。为明确该患者的病原菌，最有意义的检查是（）

A.血培养

B.痰培养

C.咽拭培养

D.尿培养

E.骨髓检查

Although the parties are entitled to make their contract in any manner that they like，it is usual for them to adopt one of the standard forms and then（）it as they think fit.

A.amend

B.repair

C.improve

D.clear