首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3564篇
  免费   209篇
  国内免费   3篇
耳鼻咽喉   107篇
儿科学   236篇
妇产科学   169篇
基础医学   263篇
口腔科学   165篇
临床医学   330篇
内科学   707篇
皮肤病学   126篇
神经病学   249篇
特种医学   172篇
外科学   715篇
综合类   33篇
预防医学   99篇
眼科学   79篇
药学   240篇
中国医学   9篇
肿瘤学   77篇
  2024年   19篇
  2023年   66篇
  2022年   79篇
  2021年   114篇
  2020年   85篇
  2019年   103篇
  2018年   160篇
  2017年   125篇
  2016年   179篇
  2015年   167篇
  2014年   247篇
  2013年   338篇
  2012年   255篇
  2011年   212篇
  2010年   178篇
  2009年   100篇
  2008年   128篇
  2007年   141篇
  2006年   165篇
  2005年   173篇
  2004年   131篇
  2003年   113篇
  2002年   86篇
  2001年   53篇
  2000年   49篇
  1999年   49篇
  1998年   39篇
  1997年   42篇
  1996年   26篇
  1995年   25篇
  1994年   19篇
  1993年   10篇
  1992年   13篇
  1991年   10篇
  1990年   9篇
  1989年   6篇
  1988年   4篇
  1987年   5篇
  1986年   4篇
  1985年   6篇
  1984年   4篇
  1982年   2篇
  1980年   6篇
  1979年   4篇
  1978年   7篇
  1977年   7篇
  1976年   2篇
  1975年   2篇
  1974年   3篇
  1934年   1篇
排序方式: 共有3776条查询结果,搜索用时 15 毫秒
11.
12.

Objective

Although the Internet is used effectively in many areas of life, some users experience problems because of over-use due to a lack of control. The diagnostic criteria for Internet addiction include disruptions in family relationships, but adequate data on the attachment styles and family functioning associated with this condition are limited. This study aimed to investigate the attachment styles and family functioning of patients with Internet addiction.

Method

The sample included 30 male patients consecutively admitted to the Bak?rköy Mental Health and Research Hospital Internet Addiction Outpatient Clinic, who were diagnosed in clinical interviews as having Internet addiction according to Young’s (1998) criteria. Thirty healthy males who were matched with the experimental group in terms of sociodemographic characteristics were included as control subjects. Both groups provided sociodemographic data and completed the Beck Depression Inventory (BDI), the Experiences in Close Relationships Questionnaire-r (ECR-r) and the Family Assessment Device (FAD).

Results

Patients with Internet addiction had higher BDI scores (P< .001) and higher attachment anxiety subscores on ECR-r (P< .001) compared with those in the control group. Patients with Internet addiction evaluated their family functioning as more negative and reported problems in every aspect addressed by the FAD. Scores on the FAD behaviour control, affective responsiveness, and problem-solving subscales (P< .05) and on the FAD communication, roles, and general functioning subscales (P< .001) were significantly higher in the patient compared with the control group.

Conclusion

Patients with Internet addiction have more anxious attachment styles as well as prominent disruptions in family functioning. Thus, it may be important to evaluate the attachment styles and family functioning of patients with Internet addiction. Indeed, comprehensive treatment approaches including other family members may make important contributions to treatment success.  相似文献   
13.
14.
Retroanastomotic hernias after gastroenterostomieseither antecolic or retrocolic-are extremely rare but are associated with high mortality rates due to delayed identification which precludes immediate surgical re-duction. In this report, we present a 77-year-old man with retroanastomotic herniation of the efferent loop segments that occurred 14 years after a Moynihan's gastroenterostomy.  相似文献   
15.

Purpose

Renal cell carcinoma (RCC) accounts for approximately 80% of the primary renal cancers, and current treatment strategies are not sufficient to provide a certain solution. Since there are not many treatment options, interest in discovery of alternative drugs has increased.

Methods

In the current study, anticancer activity of a novel heterodinuclear Cu(II)–Mn(II) complex (Schiff base—SB) in combination with poly(ethylene oxide) and poly(propylene oxide) block copolymer (pluronic) P85 was tested against RCC. Cell viability, apoptosis and gene expression analysis were conducted in vitro by using Renca cells.

Results

The results revealed that the SB–P85 combination decreased cell proliferation by increasing the apoptotic gene expressions and apoptosis. Renca-injected BALB/c mice were used to mimic early stage of RCC model. Treatment with SB–P85 combination suppressed tumor formation and growth compared to baseline.

Conclusion

Overall, SB–P85 showed promising anticancer activity against RCC in vitro and in vivo.
  相似文献   
16.
Injuries in the explosion scenarios are usually hollow organ injuries including rapid gas expansion, thermal injuries, penetrating injuries due to secondary projectiles and secondary injuries like falls and burns. Our case is a penetrating injury that was considered open knee fracture (Gustilo Anderson Type 3A) and peroneal nerve palsy in the emergency service after bomb attack but later it was seen that the secondary projectile was a foreign bone and the patient's bone integrity was intact. Our aim is to show that specific human tissues must be considered as a factor in the secondary injuries.  相似文献   
17.

Objective

In this experimental study, PRF (Platelet Rich Fibrin), HA (Hyaluronic Acid) gel and ADCON® Gel were compared in terms of preventing epidural fibrosis.

Methods

Twenty-eight Sprague–Dawley rats (mean weight, 400–450 g) were divided into 4 groups. L3-L4 laminectomy was performed in each group. Following laminectomy, Adcon® Gel, HA gel and PRF were applied onto the surgery site locally in Group 1, 2 and 3, respectively. Group 4 was maintained as control without any local application. After five weeks, L3-L4 vertebrae were removed totally and taken to histopathological evaluation for epidural fibrosis, acute inflammatory cell density, chronic inflammatory cell density, hemorrhage, angiogenesis and new bone formation.

Results

Acute inflammation cell density, angiogenesis, and new bone formation levels were comparable among the study groups (p > 0.05). However, new bone formation was higher in the PRF group. Epidural fibrosis and chronic inflammatory cell density were significantly lower in the PRF group (p < 0.05).

Conclusion

We concluded that PRF contributed to hemostasis and prevented epidural fibrosis.  相似文献   
18.
19.
20.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号