根据汉语和首字母填空提示，写出单词，完成句子。

1. Ningxia is my h             . I love it very much.

2. It has a p_           of 20 thousand people.

3. —How far is it from your home to school?  

    —It's about 2 k            .

4. There will be heavy rain in S            China.

5. Do you know the a              to the questions.

NAC’s（Network Access Control）role is to restrict network access to only compliant endpoints and （66） users．However, NAC is not a complete LAN（67）solution;additional proactive and（68）security measures must be implemented．Nevis is the first and only comprehensive LAN security solution that combines deep security processing of every packet at 100Gbps, ensuring a high level of security plus application availability and performance．Nevis integrates NAC as the first line of LAN security （69）In addition to NAC，enterprises need to implement role-based network access control as well as critical proactive security measures-real-time,multilevel （70）inspection and microsecond threat containment．

69（）

A．defense

B．intrusion

C．inbreak

D．protection