Here are some jobs that let you make a direct impact on others’ lives.

A career advisor

Career advisors help to lighten graduates’ load, often working at high schools, colleges or universities. In addition to consulting with students to help them make career decisions, the advisors also help students practice important job-seeking skills. Although some employers prefer applicants to have a master’s degree in counseling (咨询), not all require one. Pursuing a bachelor of psychology or counseling is a great place to start.

A nutritionist

As far as industries go, health care likely offers the most jobs that help people. Nutritionists work in hospitals, schools or nursing homes to help create meal plans to improve the health of their clients (客户). Along with a bachelor’s degree in food and nutrition, clinical nutrition or a related field, you’ll need to be licensed in most states.

A personal trainer

Personal trainers work with people of all ages to build custom fitness plans. Along with performing physical assessments and creating training programs, personal trainers also inspire their clients to stick to a plan so they achieve desired results. You should have a college diploma, along with an associate’s degree in a health or fitness field, and you will need to pass an exam to receive your license.

A special education teacher

A special school can be a place for students with emotional, behavioral or learning challenges. Special education teachers are there to teach them to reach their full potential. As a special education teacher, you should plan and teach lessons according to students’ specific needs and abilities. Special education teachers must have a bachelor’s degree and a state-issued certification.

Find more information on www.jobseeker.com.

Three scientists who studied how cells sense and adapt to oxygen levels have been awarded the Nobel Prize in Physiology or Medicine. William G. Kaelin, Jr. of the Dana-Farber Cancer Institute and Harvard University, Sir Peter J. Ratcliffe of Oxford University and the Francis Crick Institute, and Gregg L. Semenza of Johns Hopkins University were jointly awarded the prize.

“The meaningful discoveries by this year’s Nobel winners showed life’s most adaptive processes,” Randall Johnson, a member of the Nobel Assembly at Sweden’s Karolinska Institute said. “The three physicians found the molecular switch(分子开关)that regulates how our cells adapt when oxygen levels drop.”

“Cells and tissues are constantly experiencing changes in oxygen availability,” Johnson said. “As an embryo(胚胎) grows and develops, and as muscles work, the oxygen available changes as the tissues themselves change. Cells need a way to adjust to the amount of oxygen they have, while still doing their important jobs.”

The committee said that the discoveries are vital for physiology and could exploit new strategies to fight anemia, cancer and many other diseases.

Kaelin was born in New York and received an M. D. from Duke University. He did his specialist training in internal medicine and oncology at Johns Hopkins, Baltimore, and at the Dana-Farber Cancer Institute, Boston.

Ratcliffe was born in Lancashire, the United Kingdom, and studied medicine at Gonville and Caius College at Cambridge University and did his specialist training in nephrology at Oxford. He is the director of clinical research at the Francis Crick Institute in London and a member of the Ludwig Institute for Cancer Research.

Semenza was born in New York. He obtained a B. A. in biology from Harvard and his M. D. from the University of Pennsylvania. He did his specialist training in pediatrics at Duke University. He is the director of the Vascular Research Program at the Johns Hopkins Institute for Cell Engineering.

Costa Rica is about two-thirds the size of Scotland but still shelters five percent of the world’s biodiversity (生物多样性). Covered by rainforest and cloud forest, filled with 129 volcanoes and washed by both the Pacific Ocean and the Caribbean Sea, it is a dream destination for visitors.

In the cloud forest, hundreds of orchid (兰花) species bloom, beautiful birds sing and butterflies flash their colorful wings, while on the Caribbean coast, four species of turtle choose the warm sands as their annual nesting sites.

If you love adventure, try hiking through the lava fields of Arenal Volcano, which is among the ten most active in the world and standing at 5,437 feet tall, or walk through the cloud forest on a series of zip lines in Monteverde. And you are happy with the choice when it comes to accommodation. Will you stay in a tree house or a hotel on the beach? The options are endless.

Now it is easier to get to Costa Rica. In 2016, British Airways launched a direct flight from London Gatwick to San Jose, so you can now reach the nation in less than 11 hours. Once you arrive, touring the country is simple. There are domestic flights if you are short of time. Many hotels and tour operators put together good packages to visit local highlights, or if you prefer, you can even rent a car.

Costa Rica is a year-round destination, with the driest period between December and April. For the rest of the year, the scenery looks more green and amazing, with sunny mornings and showers in the afternoon.

A beautiful rainforest country in Central America, Costa Rica has coastlines on both the Caribbean and Pacific Ocean and some of the world’s best beaches. Costa Rica’s diversity of scenery and natural wonders provides visitors with adventure, relaxation, romance and exploration.