正确：This can prevent people from suffering accidents.

    错误：This can prevent people from suffering from accidents.

    【说明】suffer from ... 表示“苦于 ...... ；患  ...... 病”。例如：The village is suffering from depopulation.那个村庄正为人口减少而深感苦恼。/ He is suffering from a bad cold. 他在患重感冒。（外研社 建宏《英汉多功能词典》）

    suffer 作及物动词一般表示“遭受（痛苦、损害等）”。例如：The city suffered serious damage from the earthquake. 那个城市因地震而遭到严重破坏。（外研社 建宏《英汉多功能词典》）

【一】suffer from +名词 因……而痛苦。

【1】suffer from+疾病 患有……疾病；遭受（某种疾病）之苦

Sometimes I suffer from toothaches.

有时我遭受牙疼之苦。

It is said that he suffers from high blood pressure.

据说他患有高血压。

He suffers from several diseases at present.

目前他身患几种疾病。

She often suffers from headaches.

她经常头痛。

Do you often suffer from headaches?

你常头疼吗？

The little boy is suffering from a bad flu bug again.

那个小孩又再患了严重的感冒。

He was eventually diagnosed as suffering from terminal cancer...  

他最终被诊断出患了晚期癌症。

I realized he was suffering from shock.  

我意识到他休克了。

【2】suffer from+损失

Many old people suffer from the loss of memory.

很多老年人患有失意症。

【3】suffer from cold and hunger遭受饥寒交迫之苦；挨饿受冻

He is suffering from cold and hunger.

他正挨饿受冻。

Our business has suffered from lack of investment.

我们的企业因缺乏投资而日子不好过。

【4】suffer from floods and drought遭受水旱

The country has always suffered from floods and drought.

这个国家经常遭受水旱灾害。

Sometimes I still suffer from these weaknesses.

有时我还是在吃这些弱点的苦头。

I'm suffering from a real lack of time this week.

我这周为时间不够用而苦。

 【二】suffer  vt.经受，使遭受（坏事，不愉快的事），其宾语一般是loss(损失), pain（疼痛）, punishment（惩罚）, defeat（败）,wrong, hardship, torture, grief, 

injustice, disappointment等。 

You must be prepared to suffer consequences.

你要准备承担后果.

I will not suffer such conduct. 

我不能容忍这种行为。 

They suffered huge losses in the financial crisis.  

他们在经济危机时遭受了巨大损失。

The peace process has suffered a serious blow now.

现在和平进程遭到重创。

Romania suffered another setback in its efforts to obtain financial support for its reforms.  

罗马尼亚在为其改革努力寻求经济援助时再次受挫。