我国经济逐步进入从高速增长转为中高速增长、经济结构不断优化升级的新常态，但这没有改变我国发展仍处于可以大有作为的重要战略机遇期的判断，改变的是重要战略机遇期的内涵和条件，没有改变我国经济发展总体向好的基本面，改变的是经济发展方式和经济结构。对我国经济发展的上述分析（    ）

①坚持用一分为二的观点分析我国经济发展形势，把握住有利因素和不利因素

②在动静结合中认识我国的经济发展态势，对我国的经济状况作出了准确判断

③坚持的前进性和曲折性相结合的观点，勇于面对我国经济发展的困难和挫折

④坚持用发展的观点看待经济形势，正确认识新常态、适应新常态、引领新常态

    If you frequently travel for business, Stay bridge Suites offer you a range of home comforts. Four recent visitors to Staybridge Suites explain why they booked, what they enjoyed and what made them want to return.

Claire Metcalf

    “The concept is great, but the staff are the ones who really make it. ”she says. “It takes a lot of discipline to always be friendly, but the staff at Staybridge Suites do that. They genuinely care about you.”

Andrew Roberts

    “One of the best things is having my own kitchen. I often end up working late and I don't fancy eating in a restaurant on my own, so cooking for myself is a big drawcard. ”

    “The main thing for me is being able to cook and have my own little flat. The staff are amazing. It is great to be recognized by them, ”he says.

Pauline Robinson

    “What I love about it is the way that you are treated by the staff,” she says. “Some of the staff have been there all that time and they do look after you well. As a woman staying on my own, it is reassuring that they look out for you, and recently when I was poorly they even brought things I needed to my room. ”

Ryan Ruckledge

    “The fully-equipped kitchen is great. I always have a one-bed apartment so I have a separate kitchen and dining room and I'm able to relax and cook some meals. Eating out can feel a bit much when you do it day in and day out—it makes you hate what you do—and I don't want that.

设集合$M=\left\{x|x=\frac{k\pi }{2}+\frac{\pi }{4},k\in Z\right\},N=\left\{x|x=k\pi \pm \frac{\pi }{4},k\in Z\right\}$，则M、N的关系是（   ）