You need to stay for one day or two for observation.

你需要住院观察一两天。

youdao

They may be required to take part in one day or two half-day community work programmes every week as well.

同时参加者可能被安排参与每星期一天或两个半天的社区工作。

youdao

Everyone benefited from limiting their intake of coffee to just one or two cups a day.

每个人都从每天限量喝一杯或两杯咖啡的做法中受益了。

《柯林斯英汉双解大词典》

Jurgen Rehm said having one or two drinks a day is not as harmful as having seven drinks at once.

VOA: special.2009.09.08

When they meet again one day after surgery or two days after surgery,

当手术之后的一两天，他们再次见面时，

挽救生命的工作 - SpeakingMax英语口语达人

They moved from one empty city to another, never stopping for more than a day or two.

VOA: special.2010.07.17

But for one day or two of work, it's easier for a boss to say I'll pay you day by day.

NPR: Getting Paid Off the Books in America

"I'm in no position to say whether it's one day or two days or three days, but it is a very short period of time, " he said.

CNN: Kosovo

The monthly employment report has a history of most often coming in with a surprise in one direction or the other that creates a one or two-day triple-digit move by the Dow in one direction or the other.

FORBES: With The Election And Fed Uncertainty Soon Resolved, Grip Tightly For Stock Market Volatility