患儿男，7岁。患新隐球菌脑膜炎，给予两性霉素治疗2周，现患儿出现四肢软弱。体检：心律齐，第一心音较低，腱反射减弱，腹稍胀，肠鸣音减弱，考虑为低钾血症，下列有关低钾血症描述不正确的为（）

A.血钾浓度低于3.5mmol/L

B.可有活动障碍、腱反射减弱或消失，严重者发生迟缓性瘫痪

C.可有腹胀、肠鸣音减弱，甚至肠麻痹

D.可有心律失常、心肌损害表现

E.低钾血症均有症状

Mr Holmes called at many schools_________he lived to ask them to accept his son,but he was refused everywhere for being a black.

A．where

B．around where

C．near which

D．which