Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an (6) from a friend who asks you to open it. This is what happens with Melissa and several other similar email (7) . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages (8) .

As administrators seek to block dangerous email attachments through the recognition of well-known (9) , virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users. Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the (10) access to your network.

（6）是（）

A.attachment

B.packet

C.datagram

D.message

阅读以下新闻回答问题：

据2012年5月20日新闻报道：针对近日广东发现4名重症恙虫病患者，其中2名死亡的消息，海口市疾控中心专家表示，恙虫病在沿海一带较为常见，每年6-10高发，若得到及时规范的治疗不易致死。恙虫通常生长于阴暗潮湿的草丛中，往往通过鼠类，如家鼠、田鼠等进行传播。据专家介绍，预防该病需要注意三点：1．灭鼠，堵塞鼠洞。2．搞好环境卫生，定期铲除住地杂草，药物杀虫。3．在流行季度避免在草丛上坐、卧、晾晒衣被。如果发现恙虫幼虫叮咬，可立即用针挑去，涂上酒精或其他消毒剂。此外，野兔、家兔、家禽及某些鸟类也会感染该病。

（1）根据以上新闻提供的信息，你认为引起该病的病原体是                  。

（2）从传染病流行的基本环节来分析，未感染该病的人群属于              ；患恙虫病的人和动物是这种疾病的              。

（3）从预防传染病的措施看，“流行季度避免在草丛上坐、卧、晾晒衣被”属于          。