Please choose the correct ending to complete the given sentence: Health: [header] How to treat a hangover [title] Drink water. [step] While something so simple might seem ridiculous while you're hugging your toilet, re-hydrating yourself is key to overcoming any hangover. Drink 8 to 10 glasses of water slowly over the course of the morning after you have been drinking.

Ending1: Sipping water during the process will make the process go by more quickly and you'll not be as dehydrated. [substeps] By the same token, if you take the time to splash water on your face before bed after drinking, you won't end up dehydrated quickly after a hangover. Ending2: [substeps] Ask your doctor if drinking a sports drink may help you stay hydrated throughout the day. Water also helps cleanse your body by clearing your body of impurities and killing germs. Ending3: Alcohol causes your body to lose water by stimulating your kidneys to excrete more water than you drink, resulting in dehydration. The more alcohol you drink, the more water passes out of your body. Ending4: Doing so increases your body's immunity to the lingering effects of the hangover by giving you the upper-tier immunity to reverse the hangover. [substeps] Make sure that you don't skip the water.

Answer format: ending1/ending2/ending3/ending4