参考答案：B

解析：

The nurse needs to provide special care to the neural tube sac to prevent infection. Allowing the sac to dry could result in cracks that allow microorganisms to enter. Pressure on the sac could cause it to rupture, creating a portal of entry for microorganisms. Administering antibiotics and keeping the sac free from urine and stool are other measures to prevent infection. Adequate nutrition is a concern for all neonates, including those with a myelomeningocele. Like all neonates, the neonate with a myelomeningocele must be kept warm, but care must be taken to avoid drying out the neural tube sac with a radiant heater or exerting pressure using a sheet or blanket over the sac.