手术后总是存在轻微的感染风险。

There is always a slight ___risk of infection after surgery.

在被污染的水中游泳对健康有严重风险。

Swimming in polluted water carries a serious ___risk to your health.

把所有钱投资在一家公司是一种高风险策略。

Investing all your money in one company is a high-___risk strategy.