表情は硬くならず、笑みがこぼれるくらいの方がベターです。面接終了時には

表情は硬くならず、笑みがこぼれるくらいの方がベターです。
面接終了時には、忘れずに「本日は、ありがとうございました」と挨拶をしましょう。

Results (English) 1:

Look harder, smile much more is better.Closing the interview, do not forget to "a thank you" greeting.

Results (English) 2:

Expression is not hard, it much smile spilling is better.
Interview in at the end, "today, am I was thank you" to not forget to let the greeting.

Results (English) 3:

If you look hard enough to spill over, smile is better. At the end of the interview today, "let's forget, thank you".