Here is a passage followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice. How to Destroy Your Comfort Zone and Improve Your Life: A Science-Backed Guide "Growth and comfort do not coexist" — Ginni Rometty You've definitely been told at various points in your life that you need to break out of your comfort zone. Maybe you've been at a restaurant and have been nervous to try a new dish, or you've been in the same position at the same job for too many years, and now it's time for a change. In any of these cases, it's probably time to break out in order to really succeed. Beyond discovering tasty exotic food, studies show that stepping out of your comfort zone leads to greatly increased productivity, creativity, and the ability to cope with unexpected changes and further your success. There's a big caveat (警告) though: When you're sweating bullets and are so terrified that you can barely function, stepping outside your comfort zone is anything but productive. Taking a leap of faith can be downright intimidating. After all, our comfort zone has the word "comfort" in it for a reason. In fact, that's the reason many of us avoid stepping outside this zone – we've heard a million times over that it's great for us, but it feels absolutely awful in practice. Thankfully, science has an answer. A study conducted way back in 1908 by two psychologists showed that remaining in a state of comfort ensured steady performance (sounds about right). However, in order to increase or maximize performance levels, we need to be in a space of "optimal anxiety". This is where we benefit from a little bit of fear. Or, as the New York Times recently put it, "If you're too comfortable, you're not productive. And if you're too uncomfortable, you're not productive. Like Goldilocks, we can't be too hot or too cold." Challenging yourself in this place can allow you to accomplish incredible things. Think of a mountain climber; when they begin climbing mountains they don't start with Everest. They start with smaller peaks until they build up a tolerance. Once that tolerance is reached, the climber will plateau (达到平衡) and achieve a steady state of performance, then destroy that tolerance until they reach the peak. You easily can do this too by reaching your "optimal anxiety" – that Goldilocks level where you achieve maximum productivity and continually push your boundaries.