Wrong repetition of object
The doctor I know him very well.
I know the doctor very well.
In ihe sentence given, the worcs doctor and him denote one and the same object Therefore, use either doctor or him, but not both in the same sentence-. In general we don't put the object before the verb so the word order in the doctor I know him very well is also wrong.
Benefits of Iceberg lettuce
Lettuce is rich in antioxidants, especially betacarotene, vitamin C and vitamin E. These substances help cleanse the body from toxins, prevent the damage caused by freeradicals, prevent premature aging and lower the risk of chronic diseases and cancer.