If you can't handle this job by yourself, I'm just a phone call away.
若你不能自己处理这件事的话,就打个电话给我吧。
Either win the horse or lose the saddle.
不是全赢,就是全输;孤注一掷。
There are even stories of half-trained elephant calves who have refused to feed and pined to death when by some unavoidable circumstance they have been deprived of their own trainer.