猪苓汤主治证候的病机要点是（）。

A.表虚受风，水道失畅

B.脾虚湿盛，泛溢肌肤

C.中阳不足，饮停心下

D.气化不利，水蓄下焦

E.水热互结，阴伤水停

Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an （71） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （72） . Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages （73） .As administrators seek to block dangerous email attachments through the recognition of well-known （74） , 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 （75） access to your network.

A．attachment

B．packet

C．datagram

D．message