纯粹地，不折不扣地
for only one reason or purpose
They decided to close the museum purely and simply because it cost too much to run. 他们决定关闭博物馆纯粹是因为管理的费用太高。
There was no intention to deceive - this was purely and simply an accounting error.
They gave her name to journalists purely and simply for revenge.
She was wearing the necklace purely and simply to impress her friends.
This is a fashion that will never come back, purely and simply because most women didn't look good in it.
See also: purely