Booking a trip on an online travel site is convenient, but comes with its own set of problems.

◆They know who's going to spend more.

Last year, US travel research company Orbitz tracked people's online activities to test out whether Mac users spend more on travel than PC users. It turns out that on average, Mac users lay out US $20-30 more per night on hotels. As a result, online travel sites show these users more expensive travel options first. To avoid paying more, sort results by price.

◆Their software doesn't always link to the hotel's system.

A guaranteed reservation is almost impossible to come by anywhere — but the risk of your flight or hotel being overbooked increases with third-party providers. The middleman's software isn't immune(防护作用的) to system errors, so always call the hotel or airline to make sure your booking was processed.

◆Don't be fooled by packages: Often, they're low-end items grouped together.

Ever notice how travel sites recommend a hotel, a rental car, and tour package all in one click? These deals usually feature travel that no one wants, like flights with multiple layovers(中途停留). Check the fine print.

◆Once your trip is purchased, you're on your own.

An online travel agency can't provide assistance the same way an agent can if a flight is cancelled or a room is substandard. Basically, when you arrive at the airport or hotel, you're just another customer who booked at the lowest rate.

When your home becomes a tourist attraction

Have you ever looked at a beautiful little news house in London and thought “It must be so amazing to live there?”【小题1】 But for the people who actually do live in those homes, social media photography has changed what it means to live in a picturesque place.

Alice Johnston is a longtime resident of Notting Hill, the London neighborhood famous for pastel-painted row houses and for being the setting of the movie of the same name. Johnston, a journalist, has complicated feelings about her Instagram-beloved neighborhood. She lives on Portobello Road, one of the capital’s most famous streets. 【小题2】

Once, she and a friend were walking his French bulldog when a tourist asked if they could “borrow” the pup for a quick photo. The friend and the dog agreed, the Instagrammer posed with the Frenchie in front of a bright blue door and then handed over five pounds as a thank you. In that story, everybody had a good time. 【小题3】“I was once woken up at 6 a.m. on Easter Sunday by French teenagers taking pictures outside,” Johnston says.

【小题4】 Johnston tries to be sympathetic to travelers coming to her hometown, recalling how she loved taking pictures of historic neighborhoods like the Marais in Paris and Alfama in Lisbon. In fact, she recently found photos of herself as a teenager hanging out at the Notting Hill Carnival, years before she moved to the capital herself. “I love to travel, so I have to be pretty understanding when people travel to where I live, and I feel lucky that it’s cool enough that people want to come where I live.”