A new mother is concerned because her breast-feeding neonate wants to "nurse all the time. " Which of the following responses best indicates the normal neonate’s breast-feeding behavior

A. "Breast milk is ideal for your baby, so his stomach will digest it quickly, requiring more feedings. "
B. "Let me call the lactation consultant to make sure that your baby is feeding properly. "
C. "Don’t worry; your baby is an aggressive feeder and needs a lot of sucking satisfaction. "
D. "It seems as if your baby is hungry. Why don’t you provide your baby with some formula after the feeding to make sure he’s getting enough nourishment"

比较信号传导（cellsignalling）与信号转导（signaltransduction）的差别。