下列脑肿瘤中，哪种“囊变率最低”() ["A．血管母细胞瘤","B．胶质瘤","C．颅咽管瘤","D．脑转移瘤","E．脑膜瘤"]
治疗急性咽炎不应() ["A．首选广谱抗生素治疗","B．复方硼砂溶液含漱","C．应用抗病毒药物","D．适当休息，多饮水","E．全身症状较重者予以支持疗法"]
病灶呈椭圆形，位于枕大孔区，在MRI的T1加权像上呈低信号，T2加权像上高信号，没有强化，相应枕骨内板受压() ["A．蛛网膜囊肿","B．Rathke囊肿","C．胶样囊肿","D．囊性颅咽管瘤","E．囊性垂体瘤"]
正常成人脑部MRI扫描，除哪项外其他均存在铁质沉着() ["A．苍白球","B．红核","C．黑质","D．内囊后肢后端及视放射","E．齿状核"]
简述维生素D中毒的治疗措施。
简述1,25-(OH)2D3的生理功能。
