根据短文内容，回答下列问题。
Most people like to eat sweets and ice-cream better than meat and rice. If we eat them after a meal,
they're not bad for us. But if we eat them before a meal, they may take away our appetite (食欲). It is
important for us to eat our meal regularly (有规律地) each day. When we feel worried or excited, we
may not want to eat.
When a man is worrying about something, it is difficult for him to swallow (香) anything dry because
he has little appetite. Many years ago, some judges (法官) in England often gave a man some dry bread
to judge (判断) whether he was telling the truth. If the man could not swallow the bread, they thought he
was telling lies.
l. If we eat sweets and ice-cream after a meal, are they good for our health?
2. If we eat sweets and ice-cream before a meal, what will happen?
3. What do you think of the judges in England? Why?
4. Do most people like to eat sweets and ice-cream better than meat and rice?
5. Is it important for us to eat our meal regularly each day?
该二叉树对应的树林包括______棵树。