The client with a total laryngectomy receives tube feedings to meet his fluid and nutrition needs. The nurse explains to the client that the purpose of the tube feedings is to

A. prevent pain from swallowing.
B. prevent fistula development.
C. ensure adequate intake.
D. allow for adequate suture line healin

《史记》记载，“商君相秦十年，宗室贵戚多怨望（商鞅在秦国为相十年，宗室贵戚大多怨恨他）。这主要是因为商鞅变法哪一内容造成的[ ]

A．国家承认土地私有    

B．允许土地自由买变  

C．根据军功大小授予爵位和田宅

D．建立县制