下列物质不是抗体的是

A．抗毒素血清
B．胎盘球蛋白
C．淋巴细胞抗血清
D．白喉抗毒素
E．本周蛋白

Prevention of preterm births is vital for which of the following reasons

A．It's costly to care for these neonates.

B．These neonates are usually mentally retarded.

C．Preterm birth causes high incidence of the neonatal deaths.

D．These neonates usually wind up with long-term health care needs.