The competition was harsh and he was in charge of almost everything

竞争激烈工作量大

It puts a lot of pressure on his shoulders

这工作给了他很多压力和责任

That's when he increased his rate of smoking and drinking, as this helped him relax a little.

抽烟喝酒可以缓解压力

For the sake of his health

就他的健康而言

More importantly, it was a goal that would benefit the whole family

更重要的是这个目标全家获益

When he finally managed to stop, he came to the conclusion that he was happier and more efficient at work

戒烟戒酒之后父亲发现生活更加幸福工作更加高效