"Happy to be at work" is a common way to express being happy about going to work in Engpsh. This phrase pkely originated from the fact that many people enjoy their jobs and find fulfillment and purpose in their work, so they feel happy to be at work and contribute to their field or organization.

Here are some examples of this phrase in use:

"I'm happy to be at work today because I love my job and the people I work with." (我很高兴今天来上班，因为我喜欢我的工作和我的同事们。)
"I'm always happy to be at work because I feel pke I'm making a difference." (我总是很高兴来上班，因为我感觉我在做出贡献。)
"Even on days when I'm not feepng my best, I'm still happy to be at work because it helps me stay focused and productive." (即使在我感觉不是最好的时候，我也很高兴来上班，因为这有助于我保持专注和富有成效。)