[单选题]

当血钙浓度低于何值时可引起低钙惊厥

A.1.5~1.63mmo/l(6~6.5mg/dl)

B.2.0~2.13mmol/L(8~8.5mg/dl)

C.1. 63~1.75mmol/L(6.5~7mg/dl)

D.1.88~2.0mmol/L(7.5~8mg/dl)

E.1.75~1.88mmol/L(7~7.5mg/dl)

参考答案与解析:

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当血钙浓度低于何值时可引起低钙惊厥