All you do is work. 你只晓得不断地工作。
You're overdoing it. 你太操劳。 Don't stress yourself out. 不要增加你自己太多的心理压力。 Back off a (little) bit. 不要对别人施加太多压力。
You're killing yourself. 你太操劳了。 There's only so much one man can do. 一个人的能耐有限。 You can't spread yourself too thin. 你不该太过分散精力。