原发性肾小球肾病性水肿的机制是A．蛋白尿史，血浆蛋白降低而致胶体渗透压下降 B．继发

Hello, Jenny! 
      Today is the Mid-Autumn Festival. We will watch the moon tonight, and look for Chang'e and Wu Gang.
We usually eat mooncakes. They are round, like the moon. 
      National Day is also in autumn, on October 1st. My mother and father are usually free for seven days! We
will do many things together. I like going to the National Day celebration.
      But the best thing in autumn is my birthday. It's in October. I will be fifteen years old. Goodbye.
                                                                                                                                   Yours,
                                                                                                                                   Li Ming

To: Liming@yahoo.com.cn            From: Jenny@126.com Subject: _______!                         Date:29/09/ 9:12 p.m.

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