在进化上，始祖鸟化石的发现，从古生物学的角度证明了（ ） A．爬行类起源于两栖类

To make our digestive (消化的) system work well, we should avoid doing some things after having a meal, for example, drinking water. It is true that a person should drink 8 glasses of water every day to stay healthy. However, drinking water right after eating or even during a meal may disrupt (扰乱) digestion. It might affect the natural levels of acid and bile (酸和胆汁) that are necessary for proper digestion. What’s more, drinking cold water after eating might slow down digestion. So try to avoid drinking water at least an hour after a meal, and avoid drinking it while eating.
Though walking after eating is healthy, doing it immediately after a meal is not. Doing so will make it difficult for the digestive system to take in nutrients (营养) from the food. Besides, the blood will flow towards other parts of the body, like legs, hands, etc., which will make the digestive tract not have enough amount of blood flow that is needed for proper digestion. So we should wait for at least 2 hours after eating, and then begin exercising.
Sleeping should also be avoided right after eating. This is because going to bed right after a meal will lead to improper digestion. What’s more, such a habit will also make you put on a lot of weight. Therefore, wait for an hour or two, and then go to sleep.
Many of us have the habit of drinking tea just after lunch or dinner, which is really unhealthy. The tea leaves contain a large amount of acid which prevents the protein in the food from digesting. The best time to drink tea is at least one hour after eating.
Eating fruits right after a meal may fill the stomach with air and cause discomfort. They will also take time to reach the digestive tract, disturbing the entire process of digestion. To protect your stomach from digestive problems, eat fruits before or after 1-2 hours of a meal.
In a word, if you avoid doing all the above things after eating, you will surely make your digestion easy, and you will be less likely to have digestive problems.

Things to avoid immediately after eating
Drinking water	● Drinking water immediately after eating or during a meal may disrupt digestion by 小题1:______ the natural levels of acid and bile. ● Drinking cold water after eating probably reduces the小题2:______ of digestion. ● Don’t drink water until at least an hour has passed after a meal.
Going for a walk	● If we walk right after a meal, our digestive system will have 小题3:_____ taking in nutrients from the food. ● Walking right after a meal can result in 小题4:_____ digestion by causing insufficient (不足的) amount of blood flow in the digestive tract. ● Don’t 小题5:_____ out within two hours after eating.
小题6:_____	● Going to bed right after eating can小题7:_____ the digestive system working properly. ● Going to bed right after eating can 小题8:_____ one to gain weight.
Drinking tea	● The tea leaves are小题9:____ in acid, which prevents the protein in the food from digesting. ● Drink tea at least one hour after eating.
Eating fruits	● Eating fruits right after a meal may fill the stomach with air and make you feel小题10:_____. ● Fruits should be eaten before or after 1-2 hours of a meal.