（A 没有证据表明高血压(high blood pressure)是(a cause of)低骨密度（low bone density）的缘故 wrong；C 事件发生率（the incidence of）低骨密度（low bone density）和stroke随着年龄的不一样而不一样(vary with age...
He remains small, with lowbonedensity, but Soliris has stopped the attacks that destroyed his kidneys in the first place, and his dad is hoping a kidney transplant will follow and give him a normal life.