3 blocks rau ntau tus neeg taug qab (thiab tau tshaj tawm) ntawm lawv lub vev xaib.

So I found out they do provide trade-free goods: “Since 1994, Helen Keller International has provided free vision screenings for more than 2 million children in the United States and provided more than 300,000 of them with prescription eyeglasses to solve common vision problems.” – but they also provide access to some trade-based services: “We are improving access to high-quality, affordable cataract surgeries for poor and remote communities in under-served regions of Asia.” (https://www.hki.org/what-we-do/saving-sight/)

Tau kawg nws yog qhov zoo uas lawv muab cov kev phais mob cataract pheej yig rau cov neeg pluag, tab sis qhov ntawd tsis yog kev lag luam dawb. Yog li kuv tsis tuaj yeem muab 5/5 blocks rau lawv, txawm tias lawv zoo li yog ib lub koom haum zoo nrog lub hom phiaj zoo.