Should protocols for observationalresearch be registered?
观察研究的协议是否应该注册？
2
He points to previous observationalresearch suggesting that people who skip breakfast in favor of massive meals in the evening hours tend to be overweight.
他提到了此前的观测法研究，该研究认为不吃早饭的人更喜欢在晚上饱餐一顿，也更容易体重超标。
3
Methods the study belonged to an observationalresearch, we used the way of direct observation to detect samples which consistent with the internalizing standards in order.