问题 单项选择题

Assuming that markets are efficient, which of the following statements is FALSE()

A. Markets will not be volatile.

B. Investors should not trade often.

C. Investors should buy and hold passively managed index funds.

答案

参考答案:A

解析:

If markets are efficient, prices are correct. Therefore, the best investment strategy is one that chooses a market index and then minimizes investment expenses. Markets may still he volatile if important news is arriving to the market, at which time the market will react to the news, perhaps with great volatility until the news is digested.

多项选择题 案例分析题

患者男,26岁,因“急性阑尾炎术后9d,腹泻、发热6d,气促6h”入ICU。9d前因急性阑尾炎行手术治疗,术中发现阑尾坏死、穿孔,腹腔内有大量脓性液体,手术切除坏死阑尾,并给予大量0.9%氯化钠溶液冲洗腹腔。术后患者体温波动在37~39℃,予抗感染治疗。术后第3天患者出现黄绿色稀水便,每次100~300ml,每天10~15次。腹部超声:肠间和肝下有少量液性暗区。考虑为术后腹腔感染,继续抗感染治疗。术后第7天粪培养为金黄色葡萄球菌,考虑菌群失调,停用抗生素。但患者仍发热、腹泻,并在术后第9天出现呼吸急促,为进一步治疗收入ICU。既往体健。查体:T38.5℃,P100次/min,R30次/min,BP105/60mmHg;双肺呼吸音清,心律齐,未闻杂音;腹软,手术切口愈合好,伤口周围有压痛,移动性浊音(-),肠鸣音活跃(7次/min)。血常规:WBC14×109/L,N0.88,Hb140g/L,PLT300×109/L。粪常规:球杆比例为6︰4。血电解质:Na+128mmol/L,K+3.0mmol/L。BG5.5mmol/L。肾功能正常;肝功能:ALT、AST正常,总胆红素67μmol/L,直接胆红素31μmol/L,总蛋白67g/L,清蛋白31g/L。普通面罩吸氧(氧流量4L/min),血气分析:pH7.45,PaCO234mmHg,PaO290mmHg,BE2mmol/L,血糖9mmol/L。ECG:窦性心动过速。胸部X线片:无明显异常。

临床诊断SIRS的依据包括()

A.血压下降

B.中性粒细胞升高

C.呼吸急促

D.心率增快

E.白细胞升高

F.腹泻

G.体温升高

H.胆红素升高

I.粪球杆比例失调

单项选择题