从A、B、C、D四个选项中，选出与所给句子划线部分意义相同或相近并能代替的那一项。

— I'm kind of tired after hard work.

— You'd better have a good rest before the big test. [ ]

A. a lot

B. lots of

C. a little

D. a few

腹泻患儿出现低血钙症状时可用10％葡萄糖酸钙加葡萄糖稀释后静注，每次1～2ml/kg，最大量5ml/次。