在英语作文中，寒暄开头是一种常见的礼貌表达，它有助于建立友好的沟通氛围，并引导读者进入正题。以下是一些有效的寒暄开头方式：
简单的问候
How are you doing？
I hope all is well.
How's it going？
It's a long time since I got your last letter.
提及之前的沟通
Thanks for your last message.
I remember we talked about...
I have been following your work and find it very interesting.
表达关心和兴趣
I hope you had a great holiday.
I hope this email finds you well.
I've been thinking about you lately.
使用幽默
I hope your day has been as wonderful as mine.
I was just reading about... and thought of you.
正式场合的寒暄
Dear Mr./Ms. [Last Name],
I am writing to you in response to your recent inquiry.
结合时事或兴趣
Have you seen the latest news about...
I heard you're interested in...
选择合适的寒暄方式时，可以考虑以下几点：
场合：正式信件还是非正式邮件？
关系：与收信人熟悉程度如何？
目的：写信的主要目的是什么？
例如，如果你正在写一封正式的工作邮件，可能会选择更正式的寒暄方式，如“Dear Mr./Ms. [Last Name], I am writing to you in response to your recent inquiry.”。而如果是一封友好的朋友间的邮件，可能会选择更随意的问候，如“How are you doing？ I hope all is well.”。
总之，寒暄开头应根据具体情况灵活调整，既要表达出礼貌和尊重，又要保持简洁明了，以便迅速引导读者进入正题。