An analyst has calculated the following ratios for a firm: Sales/Total Assets: 2.8 Net Profit Margin (%): 4 Return on Total Assets (%): 11.2 Total Asset/Equity: 1.6 The return on equity for this firm would be closest to:（）

A. 4.48%.

B. 6.40%.

C. 17.92%.

六十七岁男性患者，近2个月来表情迟钝，常嗜睡，今晨呼之不醒，急诊入院查血糖18.4mmol/L，血钠200mmol/L，血钾5.0mmol/L，血酮2mmol/L，血pH7.36，血浆渗透压460mmol/L，C02结合力27mmol/L。

你考虑下列哪一项诊断()

A．低血糖性昏迷

B．酮症酸中毒昏迷

C．非酮症性高渗性昏迷

D．乳酸性酸中毒

E．脑血栓形成