David, a hyperkinetic 5-year-old, exhibits signs of extreme restlessness, short attention span, and impulsiveness. In order to alter the child's milieu that would likely be most therapeutic for him, what could the nurse do

A．Define behaviors of the child that will be acceptable and those that will be unacceptable.

B．Allow the child freedom to choose activities in which to participate and other children with whom to associate.

C．Increase the child's sensory stimulation and activity.

D．Limit the child's opportunities to display anger and frustration.

患者男性，55岁，因“左腰部胀痛不适半年，4小时前发作左侧肾绞痛”就诊。查体：左肾区轻度叩击痛。查泌尿系B超：双肾结石伴有左肾积水，上段输尿管扩张。

该患者为右肾下盏多发结石，最佳的治疗方法是（）

A.局限性肾盂积水可以随访观察

B.肾部分切除术

C.肾盂切开取石术

D.经肾窦切开取石术

E.右肾实质切开取石术

F.右肾下盏结石行ESWL

G.右肾盂结石经皮肾镜碎石、取石术