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【单选题】
当病人需要注射抗毒素,而又对其过敏时,可采取的治疗措施是 ( )A.
脱敏疗法
B.
减敏疗法
C.
先小量注射类毒素，再大量注射抗毒素
D.
先服用抗过敏药物，再注射抗毒素
E.
同时注射类毒素和足量抗毒素
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