患儿,男,3岁,乳前牙反覆浅,反覆盖大,此时应选择什么矫治器()
A.下颌连冠式斜面导板
B.垫+双曲舌簧
C.颏兜
D.头帽
E.上颌前牵引
参考答案:A
Tim’s mum is worried _______ her son’s eyesight as he plays online games too much.
A.for
B.about
C.with
D.of
若膀胱镜检查可见右输尿管口喷出血尿,膀胱内未见异常,应首先考虑进行下列哪项检查
A.MRI检查B.CT检查C.肾动脉造影检查D.排泄性尿路造影E.输尿管镜检查