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   998篇
  免费   42篇
  国内免费   67篇
耳鼻咽喉   2篇
儿科学   62篇
妇产科学   31篇
基础医学   104篇
口腔科学   38篇
临床医学   100篇
内科学   209篇
皮肤病学   7篇
神经病学   70篇
特种医学   102篇
外科学   100篇
综合类   19篇
预防医学   31篇
眼科学   4篇
药学   118篇
中国医学   6篇
肿瘤学   104篇
  2022年   8篇
  2021年   6篇
  2019年   15篇
  2018年   16篇
  2017年   14篇
  2016年   14篇
  2015年   10篇
  2014年   17篇
  2013年   25篇
  2012年   33篇
  2011年   44篇
  2010年   17篇
  2009年   32篇
  2008年   37篇
  2007年   69篇
  2006年   40篇
  2005年   34篇
  2004年   33篇
  2003年   31篇
  2002年   35篇
  2001年   35篇
  2000年   39篇
  1999年   25篇
  1998年   34篇
  1997年   30篇
  1996年   28篇
  1995年   22篇
  1994年   21篇
  1993年   13篇
  1992年   16篇
  1991年   22篇
  1990年   31篇
  1989年   30篇
  1988年   29篇
  1987年   30篇
  1986年   21篇
  1985年   22篇
  1984年   8篇
  1983年   14篇
  1982年   12篇
  1981年   11篇
  1980年   6篇
  1979年   5篇
  1978年   10篇
  1977年   8篇
  1976年   9篇
  1975年   10篇
  1974年   4篇
  1970年   4篇
  1968年   4篇
排序方式: 共有1107条查询结果,搜索用时 15 毫秒
71.
王玉  陈国良  吴耀民 《医学争鸣》2005,26(10):960-960
在大规模登陆作战中需要大量的卫生船舶实施各种保障,因此必须对卫生船舶进行合理的配置,保证其既能有效地完成保障任务,又能避免重叠配置造成浪费.卫生船舶的配置应与指挥关系、保障任务战时分类相适应,具体配置时按医院船、卫生运输船、卫生救护艇的保障要求配置,并可根据保障任务的变化进行相应的调整.  相似文献   
72.
73.

Background

Data on the epidemiology of bacteremias and invasive fungal diseases (IFD) in children with acute myeloid leukemia (AML) are scarce.

Design and Methods

In a multi‐center, retrospective study, we analyzed proportion, rate per 1,000 person‐days at risk, and cumulative risk of bacteremias and IFD in children with AML.

Results

Between January 1998 and December 2005, 240 children were treated for AML at 8 Italian Centers, for a total of 521 treatment courses and 63,232 person‐days at risk. Bacteremia was observed in 32% of treatment courses and IFD was seen in 10% (P < 0.0001), with rates of 2.62 and 0.84, respectively (P < 0.001). There was a significantly higher frequency of IFD during relapse treatment: proportion 15% versus 9% (P = 0.05), rate 2.10 versus 0.64 (P = 0.008) and cumulative risk 32% versus 12% (P = 0.007), while there were no differences in the proportion, rate and cumulative risk of bacteremia during front‐line or relapse treatment. The epidemiology of bacteremias and IFD was different during front‐line therapy for M3 as compared to other types of AML, but the differences were not statistically significant.

Conclusions

Severe infectious complications are frequent during the treatment of pediatric AML, especially during relapse treatment, and bacteremias are more frequent than IFD. Pediatr Blood Cancer. 2010;55:1103–1107. © 2010 Wiley‐Liss, Inc.
  相似文献   
74.
75.
The Authors report a case of a serious and symptomatic primary pulmonary hypertension, where the intravenous administration of Diltiazem, at a dosage of 0.3 mg/kg, resulted in an important improvement of haemodynamic parameters. This improvement was confirmed 4 months later on chronic oral therapy with Diltiazem, at a dosage of 180 mg per day. Six months after the beginning of therapy, the patient is totally asymptomatic. Even though further controls are needed, Diltiazem may represent an active drug in the treatment of primary pulmonary hypertension.  相似文献   
76.
77.
In order to assess the efficacy and tolerability of a fluocinolone acetonide tape (8 micrograms/cm2), 30 volunteer out-patients, 11 females and 19 males, mean age 43.4 years, affected by different kinds of dermatoses were treated. The tape was applied once or twice daily for an average period of 9.3 days. At the beginning and the end of the treatment, detailed dermatological and blood chemistry examinations were performed in all the patients. The clinical results were excellent for all the dermatoses treated. Itching at the site of application was reported by two patients and slight atrophy was observed in one patient. The patients' compliance was excellent. The blood chemistry tests showed no significant variation.  相似文献   
78.
In the last few years serum CA 19-9 has been shown to be a highly sensitive marker of pancreatic adenocarcinoma. This study assesses the value of serum CA 19-9 assay in the postsurgical follow-up of patients undergoing pancreatic cancer resection. In 14 patients with cancer in the head of the pancreas and abnormal preoperative serum CA 19-9 values (greater than 40 U/ml), a pancreatoduodenectomy was performed. In all patients the CA 19-9 antigen was immunohistochemically demonstrated on the removed tumoral tissue. Postoperative serum CA 19-9 concentrations were serially measured 15 days after surgery and then every other month. Serum CA 19-9 scores returned to the normal range only in 7 (50%) of the resected patients. All patients with a normal postoperative value and none of those with a persistently elevated one survived longer than 7 months. Early postoperative serum CA 19-9 assay was superior to perioperative staging of the tumor as a prognostic index. All of the seven patients with postoperative normal values exhibited a subsequent increase within 16 months. In all cases the elevation of CA 19-9 occurred at least 2 months before ultrasound (US) could detect local recurrences of hepatic metastasis. Our data indicate that a normal early postoperative CA 19-9 score is a relatively favourable prognostic index in patients who undergo radical surgery for pancreatic cancer and that the CA 19-9 test can be used, as an early marker of recurrence, in monitoring these patients.  相似文献   
79.
Swartz  JD; Berger  AS; Zwillenberg  S; Popky  GL 《Radiology》1987,163(3):763-765
Erosions of the ossicular chain that occurred as a complication of noncholesteatomatous chronic otitis media were studied with computed tomography (CT) in 55 patients. The incus (particularly the long and lenticular processes) was the ossicle most commonly involved (50 cases). Coronal and axial CT sections were complementary in the diagnosis of these erosions. Fibrous replacement of the incudostapedial articulation was diagnosed in four cases on axial CT scans when an unusually wide joint was present.  相似文献   
80.
Febantel and one of its main metabolites, febantel sulphoxide, are chemically modified to only a slight extent when incubated in vitro with sheep and cattle ruminal fluids; other major metabolites, fenbendazole and oxfendazole, are respectively, oxidized to oxfendazole and reduced to fenbendazole. Febantel is negligibly metabolized by hepatic cytosol fractions but microsome preparations effect more extensive metabolic transformations. Important differences in this respect were found between microsome preparations from rat, horse, pig, cattle, sheep, chicken and trout livers.  相似文献   
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