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【单选题】
用维生素B6能治疗妊娠呕吐、小儿惊厥，是因为A.
维生素B6能与γ—氨基丁酸等抑制性神经递质结合，促进这些物质排泄
B.
引起妊娠呕吐、小儿惊厥的原因是维生素B6缺乏
C.
维生素B6作为谷氨酸脱羧酶的辅酶参与抑制性神经递质γ—氨基丁酸的生成
D.
维生素B6能拮抗γ—氨基丁酸对中枢神经统的抑制作用
E.
维生素B6是抑制性神经递质的受体
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