Question: "just as the chinese society is very polarised, so is the health care system. in the country, the doctors are often just laymen with an advanced first aid course.
Answer: --> "Just as the Chinese society is very polarised, so is the health care system. In the country, the doctors are often just laymen with an advanced first aid course.

Question: in 1933 he published a theorem on convex polyhedra and an elementary proof of the existence of a centre of symmetry in a three-dimensional convex polyhedron.
Answer: --> In 1933 he published A theorem on convex polyhedra and An elementary proof of the existence of a centre of symmetry in a three-dimensional convex polyhedron.

Question: the security feature needs to be enabled in the windows registry, and there for every machine that you want to enable the feature on.
Answer:
--> The security feature needs to be enabled in the Windows Registry, and there for every machine that you want to enable the feature on.