56岁男性患者，劳累后心慌气促10余年，近来自觉症状加重。临床听诊，心尖区有舒张期隆隆样杂音，行胸部X检查，如图所示，你认为下列描述正确的是()

A．后前位示双侧肺血增多，肺动脉段隆起，左心缘出现第3弓

B．右前斜位示左心房增大，心后上缘后突压迫冲钡食管

C．左前斜位示心影向后下方突出

D．考虑三尖瓣狭窄

E．考虑二尖瓣狭窄

An investment policy statement for a firm’s short-term cash management function would least appropriately include :（）

A. a list of permissible securities.

B. procedures to follow if the investment guidelines are violated.

C. limits on the proportion of the portfolio which can be invested in each permitted security type.