As it turned out to be a small house party, we        so formally.

A．needn’t dress up

B．did not need have dressed up

C．did not need to dress up

D．needn’t have dressed up

9个月患儿，因呕吐、腹泻2天入院，初步诊断为婴儿腹泻伴脱水。

考虑该患儿为等渗性脱水，选用的液体是( )

A．等张含钠液

B．1/2张含钠液

C．1/5张含钠液

D．1/3张含钠液

E．1/4张含钠液