Baboons(狒狒) live in Africa. They are like monkeys. Most people think daddy baboons don't know their babies. But scientists (科学家) find that daddy baboons know how to help their babies. The daddy baboons are smart.
Joan Silk is a scientist. She studies the baboons for 3 years. She says the daddy baboons are happy to see their babies. They have big teeth to help the babies to eat hard things. Mother baboons are small. And they live in a place. When a mother baboon gives birth(分娩), she often has only one baby. Baby baboons have fur. They are very cute.
During the day they eat things. At night, they sleep in the trees. Most children like baboons because they look like the man.

自尊是人人都需要的，要做到自尊就必须（    ）
①自己看得起自己，自己尊重自己，正确看待自己不如别人的地方
②对自己不恰当的行为知道惭愧，感到难为情，知道羞耻，正确对待自己的缺点
③对待他人对自己的评价要斤斤计较   
④尊重自己的人格，不做有损人格的事 

下列关于东北地区经济发展的描述，正确的是（ ）