Describe the personal liabilities that may be incurred when carrying out business in the following formations:

(a) a sole trader; (2 marks)

患者，女性，50岁，因腹痛、呕吐、停止排气排便就诊，尿量600ml/d。查体：血压100/70mmHg，皮肤干燥，眼球下陷，腹胀，肠鸣音亢进，白细胞12×10/L，血清钾3.7mmol/L，血清钠128mmol/L血清氯101mmol/L。

此患者存在的水代谢紊乱是______

A．等渗性脱水
B．低渗性脱水
C．高渗性脱水
D．水中毒
E．以上全不对