You are assigned as the project manager in the middle of the project. The project is within the baselines, but the customer is not happy with the performance of the project. What is the FIRST thing you should do （）

A. Discuss it with the project team. 

B. Recalculate baselines. 

C. Renegotiate the contract. 

D. Meet with the customer.

女，20岁，发热20天，体温最高39．3℃，上腹痛，间断腹泻，大便黄稀，四肢关节疼痛、红肿，局部皮下有硬结，尿常规发现红细胞（+），白细胞（+），尿蛋白（++）。

该患者对诊断最有价值的检查是（）

A.肠镜

B.尿培养

C.痰培养

D.自身抗体

E.肥达-外斐试验