其实信头称呼后就可以直接插入正题了,
如果非要加上问候语的话也可以随意一点,
比如：
How are you?
How have you been?
I hope everything is fine with you.
Hope you enjoy your day.
Did you have a pleasant weekend?
Long time no see,I miss you so much.
就像外国人见面喜欢谈论天气一样,
总之找个合适的话题然后切入正文就可以拉!