碳素钢中杂质硫、磷的含量越多，则钢的质量越好。( )

After a gastrectomy, the client will have a nasogastric tube in place for several days postoperatively. The nurse explains to the client that the nasogastric tube is for which of the following reasons

A．Prevent excessive pressure on suture lines.

B．Prevent the development of ascites.

C．Provide enteral feedings in the immediate postoperative period.

D．Enable administration of antacids to promote healing of the anastomosis.