What are the limits of the relationship between a Muslim and a Christian in the context of study or work?

In the realm of fatwas, the esteemed questioner's request cannot be fully met, as it requires independent research. One can benefit from well-known references such as Ibn Al-Qayyim's book "Ahkam Ahl Al-Dhimmah" (Rulings Concerning the People of the Covenant). Among contemporary concise treatises are: "Ahkam Al-Ta'amul Ma' Ghayr Al-Muslimin" (Rulings on Dealing with Non-Muslims) by Sheikh Khalid Al-Majid, "Samahat Al-Islam fi Al-Ta'amul Ma' Ghayr Al-Muslimin" (The Tolerance of Islam in Dealing with Non-Muslims) by Dr. Hikmat bin Bashir, and "Al-Ta'ayush Ma' Ghayr Al-Muslimin fi Al-Mujtama' Al-Muslim" (Coexistence with Non-Muslims in Muslim Society) by Dr. Munqidh Al-Saqqar. The guidelines for a Muslim's relationship with non-Muslims have been previously clarified in earlier fatwas.