Reading Comprehension of Dream of the Red Chamber

Granny Liu sat down and picked up her chopsticks, her hands heavy. It was originally Feng Jie and Yuanyang who had discussed it and decided to take a pair of old ivory chopsticks inlaid with gold to Granny Liu. When Granny Liu saw it, she said,"This fork is heavier than my shovel. How can I be more stubborn than him?" Everyone laughed. He saw a daughter-in-law standing there with a box. A servant girl came up to remove the lid. There were two bowls of dishes inside. Li Wan placed a bowl on Grandmother Jia's table. Sister Feng picked up a bowl of pigeon eggs and placed it on Granny Liu's table. Grandmother Jia said,"Please." Granny Liu stood up and said loudly,"Old Liu, Old Liu, your appetite is as big as a cow's. You won't raise your head even if you eat an old sow." She puffed her cheeks and said nothing. Everyone was stunned at first, but when they heard this, they all burst into laughter. Shi Xiangyun couldn't stand it and spat out a mouthful of rice. Lin Daiyu laughed until she was out of breath and leaned over the table. Baoyu had already rolled into Grandmother Jia's arms. Grandmother Jia laughed and hugged Baoyu, calling him darling. Lady Wang laughed and pointed at Feng Jie, unable to speak. Aunt Xue couldn't stand it either. The tea in her mouth sprayed all over Tanchun's skirt. Tanchun's rice bowl fell on Yingchun. Xichun left his seat and pulled his nanny to rub her intestines. There was no one on the ground who didn't bend their backs. Some hid outside and squatted down to laugh, while others held back their laughter and came up to help his sister change her clothes. Only Feng Jie and Yuan Yang were supporting her, and they only asked Granny Liu to help them. 1.Many people were written in this passage, and one of them was named () 2.Here are some () and () deliberately taken (), the purpose is to please (), to make everyone happy 3.This paragraph focuses on the situation of ()()()()()()()()()()() These people laugh. Draw a horizontal line across these sentences in the text (everyone just stick the sentences here, thank you) 4.Why was everyone stunned at first? Why did everyone laugh out loud afterwards?