Low-carbon life is of great benefit to improve the world environment. _____ can be enjoyed from it until you have a deep understanding of it, though.

A．something

B．Nothing

C．Few

D．Much

酶兔疫分析技术中，根据抗原抗体反应是否需要分离结合的与游离的酶标记物而分为（）与（）两种类型。