You'd better watch your step or you'll get into trouble again.
你最好留点儿神, 免得再惹麻烦。
Just my shirt and jeans.
我就穿衬衣和牛仔裤。
On turning eagerly to the text, one learns that the lady was a typist who found the sound of office typewriters worried her more and more until eventually she had to go into a mental hospital.